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database application using SQL DML statements: Insert, Select, Update, Delete with operators, functions, and set operator.

B
bhavesh lande

The document details the creation and management of SQL queries for a database application, specifically focusing on employee ('emp') and department ('dept') tables. It includes commands for inserting records, querying employee salaries within a certain range, and aggregating data such as minimum, maximum, and average salaries grouped by department. Furthermore, various SQL functionalities are demonstrated, including selection conditions, grouping, and arithmetic operations on the data.

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Practical No: 3 Problem Statement: Design at least 10 SQL queries for suitable database application using SQL DML statements: Insert, Select, Update, Delete with operators, functions, and set operator. mysql> use prac3; Database changed mysql> DROP TABLE IF EXISTS emp; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> mysql> CREATE TABLE emp ( -> empno decimal(4,0) NOT NULL, -> ename varchar(10) default NULL, -> job varchar(9) default NULL, -> mgr decimal(4,0) default NULL, -> hiredate date default NULL, -> sal decimal(7,2) default NULL, -> comm decimal(7,2) default NULL, -> deptno decimal(2,0) default NULL -> ); Query OK, 0 rows affected (0.06 sec) mysql> mysql> DROP TABLE IF EXISTS dept; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> mysql> CREATE TABLE dept ( -> deptno decimal(2,0) default NULL, -> dname varchar(14) default NULL, -> loc varchar(13) default NULL -> ); Query OK, 0 rows affected (0.01 sec) mysql> mysql> INSERT INTO emp VALUES ('7369','SMITH','CLERK','7902','1980-12- 17','800.00',NULL,'20'); Query OK, 1 row affected (0.02 sec) mysql> INSERT INTO emp VALUES ('7499','ALLEN','SALESMAN','7698','1981-02- 20','1600.00','300.00','30'); Query OK, 1 row affected (0.04 sec) mysql> INSERT INTO emp VALUES ('7521','WARD','SALESMAN','7698','1981-02- 22','1250.00','500.00','30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7566','JONES','MANAGER','7839','1981-04- 02','2975.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7654','MARTIN','SALESMAN','7698','1981-09- 28','1250.00','1400.00','30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7698','BLAKE','MANAGER','7839','1981-05- 01','2850.00',NULL,'30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7782','CLARK','MANAGER','7839','1981-06- 09','2450.00',NULL,'10'); Query OK, 1 row affected (0.01 sec)
mysql> INSERT INTO emp VALUES ('7788','SCOTT','ANALYST','7566','1982-12- 09','3000.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7839','KING','PRESIDENT',NULL,'1981-11- 17','5000.00',NULL,'10'); Query OK, 1 row affected (0.00 sec) mysql> select ename, sal frommysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) mysql> INSERT INTO emp VALUES ('7844','TURNER','SALESMAN','7698','1981-09- 08','1500.00','0.00','30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7876','ADAMS','CLERK','7788','1983-01- 12','1100.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7900','JAMES','CLERK','7698','1981-12- 03','950.00',NULL,'30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7902','FORD','ANALYST','7566','1981-12- 03','3000.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7934','MILLER','CLERK','7782','1982-01- 23','1300.00',NULL,'10');
Query OK, 1 row affected (0.01 sec) mysql> mysql> INSERT INTO dept VALUES ('10','ACCOUNTING','NEW YORK'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO dept VALUES ('20','RESEARCH','DALLAS'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO dept VALUES ('30','SALES','CHICAGO'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO dept VALUES ('40','OPERATIONS','BOSTON'); Query OK, 1 row affected (0.00 sec) mysql> desc emp; +----------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+--------------+------+-----+---------+-------+ | empno | decimal(4,0) | NO | | NULL | | | ename | varchar(10) | YES | | NULL | | | job | varchar(9) | YES | | NULL | | | mgr | decimal(4,0) | YES | | NULL | | | hiredate | date | YES | | NULL | | | sal | decimal(7,2) | YES | | NULL | | | comm | decimal(7,2) | YES | | NULL | | | deptno | decimal(2,0) | YES | | NULL | | +----------+--------------+------+-----+---------+-------+ 8 rows in set (0.00 sec) mysql> select * from emp; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+---------+--------+ 14 rows in set (0.00 sec) mysql> select distinct(job) from emp; +-----------+ | job | +-----------+mysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 |
| SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) | CLERK | | SALESMAN | | MANAGER | | ANALYST | | PRESIDENT | +-----------+ 5 rows in set (0.00 sec) mysql> select empno,ename,sal from emp where deptno=20 ; +-------+-------+---------+ | empno | ename | sal | +-------+-------+---------+ | 7369 | SMITH | 800.00 | | 7566 | JONES | 2975.00 | | 7788 | SCOTT | 3000.00 | | 7876 | ADAMS | 1100.00 | | 7902 | FORD | 3000.00 | +-------+-------+---------+ 5 rows in set (0.00 sec) mysql> select empno,ename,sal from emp where deptno like 20 ; +-------+-------+---------+ | empno | ename | sal | +-------+-------+---------+ | 7369 | SMITH | 800.00 | | 7566 | JONES | 2975.00 | | 7788 | SCOTT | 3000.00 | | 7876 | ADAMS | 1100.00 | | 7902 | FORD | 3000.00 | +-------+-------+---------+ 5 rows in set (0.00 sec) mysql> select empno,ename,sal from emp where ename like 'a%' ; +-------+-------+---------+ | empno | ename | sal | +-------+-------+---------+ | 7499 | ALLEN | 1600.00 | | 7876 | ADAMS | 1100.00 | +-------+-------+---------+ 2 rows in set (0.00 sec) mysql> select * from emp where ename like '__N%'; +-------+-------+-----------+------+------------+---------+------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+-----------+------+------------+---------+------+--------+ | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | +-------+-------+-----------+------+------------+---------+------+--------+ 2 rows in set (0.00 sec) mysql> select deptno as DEPTNO, MAX(sal) as "MAXIMUM SALARY" from emp group by (deptno); +--------+----------------+ | DEPTNO | MAXIMUM SALARY |
+--------+----------------+ | 10 | 5000.00 | | 20 | 3000.00 | | 30 | 2850.00 | +--------+----------------+ 3 rows in set (0.00 sec) mysql> select count(sal) from emp where sal=3000; +------------+ | count(sal) | +------------+ | 2 | +------------+ 1 row in set (0.00 sec) mysql> select MAX(sal) from emp; +----------+ | MAX(sal) | +----------+ | 5000.00 | +----------+ 1 row in set (0.00 sec) mysql> select MIN(sal) from emp; +----------+ | MIN(sal) | +----------+ | 800.00 | +----------+ 1 row in set (0.00 sec) mysql> select MIN(sal) least, MAX(sal) max from emp; +--------+---------+ | least | max | +--------+---------+ | 800.00 | 5000.00 | +--------+---------+ 1 row in set (0.00 sec) mysql> select deptno , MIN(sal) "MINIMUM SALARY" from emp group by (deptno); +--------+----------------+ | deptno | MINIMUM SALARY | +--------+----------------+ | 10 | 1300.00 | | 20 | 800.00 | | 30 | 950.00 | +--------+----------------+ 3 rows in set (0.00 sec) mysql> select SUM(sal) totalsal from emp; +----------+ | totalsal | +----------+ | 29025.00 | +----------+ 1 row in set (0.00 sec) mysql> select deptno , SUM(sal) "sal sum" from emp group by (deptno); +--------+----------+ | deptno | sal sum | +--------+----------+ | 10 | 8750.00mysql> select * from t1; +-----+-------+
| Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | | 20 | 10875.00 | | 30 | 9400.00 | +--------+----------+ 3 rows in set (0.00 sec) mysql> select deptno , avg(sal) "sal avg" from emp group by (deptno); +--------+-------------+ | deptno | sal avg | +--------+-------------+ | 10 | 2916.666667 | | 20 | 2175.000000 | | 30 | 1566.666667 | +--------+-------------+ 3 rows in set (0.00 sec) mysql> select * from emp where job in('CLERK','PRESIDENT'); +-------+--------+-----------+------+------------+---------+------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+------+--------+ 5 rows in set (0.00 sec) mysql> select * from emp where job not in('CLERK','PRESIDENT'); +-------+--------+----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+----------+------+------------+---------+---------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | +-------+--------+----------+------+------------+---------+---------+--------+
9 rows in set (0.00 sec) mysql> select * fromysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) m emp order by comm; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7782 | CLARK | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2;
+-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | +-------+--------+- mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | 5 | pati | +-----+-------+
5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) ----------+------+------------+---------+---------+--------+ 14 rows in set (0.00 sec) mysql> select * from emp where comm <> 'NULL'; +-------+--------+----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+----------+------+------------+---------+---------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | +-------+--------+----------+------+------------+---------+---------+--------+ 3 rows in set, 1 warning (0.00 sec) mysql> select * from emp where comm <> 'NULL' order by comm desc; +-------+--------+----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+----------+------+------------+---------+---------+--------+ | 7654 | MARTIN | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec)
mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) sec) SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | +-------+--------+----------+------+------------+---------+---------+--------+ 3 rows in set, 1 warning (0.00 sec) mysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+mysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+
| Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | | JONES | 2975.00 | | MARTIN | 1250.00 mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 |
| TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) mysql> select empno,ename,job,comm,sal from emp where sal>=1000 and sal<=3000; +-------+--------+----------+---------+---------+ | empno | ename | job | comm | sal | +-------+--------+----------+---------+---------+ | 7499 | ALLEN | SALESMAN | 300.00 | 1600.00 | | 7521 | WARD | SALESMAN | 500.00 | 1250.00 | | 7566 | JONES | MANAGER | NULL | 2975.00 | | 7654 | MARTIN | SALESMAN | 1400.00 | 1250.00 | | 7698 | BLAKE | MANAGER | NULL | 2850.00 | | 7782 | CLARK | MANAGER | NULL | 2450.00 | | 7788 | SCOTT | ANALYST | NULL | 3000.00 | | 7844 | TURNER | SALESMAN | 0.00 | 1500.00 | | 7876 | ADAMS | CLERK | NULL | 1100.00 | | 7902 | FORD | ANALYST | NULL | 3000.00 | | 7934 | MILLER | CLERK | NULL | 1300.00 | +-------+--------+----------+---------+---------+ 11 rows in set (0.00 sec) mysql> select empno,ename,job,comm,sal from emp where sal>=1000 or sal<=3000; +-------+--------+-----------+---------+---------+ | empno | ename | job | comm | sal | +-------+--------+-----------+---------+---------+ | 7369 | SMITH | CLERK | NULL | 800.00 | | 7499 | ALLEN | SALESMAN | 300.00 | 1600.00 | | 7521 | WARD | SALESMAN | 500.00 | 1250.00 | | 7566 | JONES | MANAGER | NULL | 2975.00 | | 7654 | MARTIN | SALESMAN | 1400.00 | 1250.00 | | 7698 | BLAKE | MANAGER | NULL | 2850.00 | | 7782 | CLARK | MANAGER | NULL | 2450.00 | | 7788 | SCOTT | ANALYST | NULL | 3000.00 | | 7839 | KING | PRESIDENT | NULL | 5000.00 | | 7844 | TURNER | SALESMAN | 0.00 | 1500.00 | | 7876 | ADAMS | CLERK | NULL | 1100.00 | | 7900 | JAMES | CLERK | NULL | 950.00 | | 7902 | FORD | ANALYST | NULL | 3000.00 |
| 7934 | MILLER | CLERK | NULL | 1300.00 | +-------+--------+-----------+---------+---------+ 14 rows in set (0.00 sec) mysql> select empno,ename,job,comm,sal from emp where not sal=3000; +-------+--------+-----------+---------+---------+ | empno | ename | job | comm | sal | +-------+--------+-----------+---------+---------+ | 7369 | SMITH | CLERK | NULL | 800.00 | | 7499 | ALLEN | SALESMAN | 300.00 | 1600.00 | | 7521 | WARD | SALESMAN | 500.00 | 1250.00 | | 7566 | JONES | MANAGER | NULL | 2975.00 | | 7654 | MARTIN | SALESMAN | 1400.00 | 1250.00 | | 7698 | BLAKE | MANAGER | NULL | 2850.00 | | 7782 | CLARK | MANAGER | NULL | 2450.00 | | 7839 | KING | PRESIDENT | NULL | 5000.00 | | 7844 | TURNER | SALESMAN | 0.00 | 1500.00 | | 7876 | ADAMS | CLERK | NULL | 1100.00 | | 7900 | JAMES | CLERK | NULL | 950.00 | | 7934 | MILLER | CLERK | NULL | 1300.00 | +-------+--------+-----------+---------+---------+ 12 rows in set (0.00 sec) mysql> update emp set comm=520 where empno=7369; Query OK, 1 row affected (0.37 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from emp; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | 520.00 | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+---------+--------+ 14 rows in set (0.00 sec) mysql> delete from emp where empno=7369; Query OK, 1 row affected (0.01 sec) mysql> select * from emp; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 |
| 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+---------+--------+ 13 rows in set (0.00 sec) ________________________________________________________________________________ _______ mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t1 union select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 7 rows in set (0.00 sec) mysql> select distinct(Rno) as "Common RollNo" from t1 inner join t2 using(Rno); +---------------+ | Common RollNo | +---------------+ | 3 | | 4 | | 5 | +---------------+ 3 rows in set (0.00 sec)

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database application using SQL DML statements: Insert, Select, Update, Delete with operators, functions, and set operator.

  • 1. Practical No: 3 Problem Statement: Design at least 10 SQL queries for suitable database application using SQL DML statements: Insert, Select, Update, Delete with operators, functions, and set operator. mysql> use prac3; Database changed mysql> DROP TABLE IF EXISTS emp; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> mysql> CREATE TABLE emp ( -> empno decimal(4,0) NOT NULL, -> ename varchar(10) default NULL, -> job varchar(9) default NULL, -> mgr decimal(4,0) default NULL, -> hiredate date default NULL, -> sal decimal(7,2) default NULL, -> comm decimal(7,2) default NULL, -> deptno decimal(2,0) default NULL -> ); Query OK, 0 rows affected (0.06 sec) mysql> mysql> DROP TABLE IF EXISTS dept; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> mysql> CREATE TABLE dept ( -> deptno decimal(2,0) default NULL, -> dname varchar(14) default NULL, -> loc varchar(13) default NULL -> ); Query OK, 0 rows affected (0.01 sec) mysql> mysql> INSERT INTO emp VALUES ('7369','SMITH','CLERK','7902','1980-12- 17','800.00',NULL,'20'); Query OK, 1 row affected (0.02 sec) mysql> INSERT INTO emp VALUES ('7499','ALLEN','SALESMAN','7698','1981-02- 20','1600.00','300.00','30'); Query OK, 1 row affected (0.04 sec) mysql> INSERT INTO emp VALUES ('7521','WARD','SALESMAN','7698','1981-02- 22','1250.00','500.00','30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7566','JONES','MANAGER','7839','1981-04- 02','2975.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7654','MARTIN','SALESMAN','7698','1981-09- 28','1250.00','1400.00','30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7698','BLAKE','MANAGER','7839','1981-05- 01','2850.00',NULL,'30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7782','CLARK','MANAGER','7839','1981-06- 09','2450.00',NULL,'10'); Query OK, 1 row affected (0.01 sec)
  • 2. mysql> INSERT INTO emp VALUES ('7788','SCOTT','ANALYST','7566','1982-12- 09','3000.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7839','KING','PRESIDENT',NULL,'1981-11- 17','5000.00',NULL,'10'); Query OK, 1 row affected (0.00 sec) mysql> select ename, sal frommysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) mysql> INSERT INTO emp VALUES ('7844','TURNER','SALESMAN','7698','1981-09- 08','1500.00','0.00','30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7876','ADAMS','CLERK','7788','1983-01- 12','1100.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7900','JAMES','CLERK','7698','1981-12- 03','950.00',NULL,'30'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7902','FORD','ANALYST','7566','1981-12- 03','3000.00',NULL,'20'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO emp VALUES ('7934','MILLER','CLERK','7782','1982-01- 23','1300.00',NULL,'10');
  • 3. Query OK, 1 row affected (0.01 sec) mysql> mysql> INSERT INTO dept VALUES ('10','ACCOUNTING','NEW YORK'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO dept VALUES ('20','RESEARCH','DALLAS'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO dept VALUES ('30','SALES','CHICAGO'); Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO dept VALUES ('40','OPERATIONS','BOSTON'); Query OK, 1 row affected (0.00 sec) mysql> desc emp; +----------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+--------------+------+-----+---------+-------+ | empno | decimal(4,0) | NO | | NULL | | | ename | varchar(10) | YES | | NULL | | | job | varchar(9) | YES | | NULL | | | mgr | decimal(4,0) | YES | | NULL | | | hiredate | date | YES | | NULL | | | sal | decimal(7,2) | YES | | NULL | | | comm | decimal(7,2) | YES | | NULL | | | deptno | decimal(2,0) | YES | | NULL | | +----------+--------------+------+-----+---------+-------+ 8 rows in set (0.00 sec) mysql> select * from emp; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+---------+--------+ 14 rows in set (0.00 sec) mysql> select distinct(job) from emp; +-----------+ | job | +-----------+mysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 |
  • 4. | SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) | CLERK | | SALESMAN | | MANAGER | | ANALYST | | PRESIDENT | +-----------+ 5 rows in set (0.00 sec) mysql> select empno,ename,sal from emp where deptno=20 ; +-------+-------+---------+ | empno | ename | sal | +-------+-------+---------+ | 7369 | SMITH | 800.00 | | 7566 | JONES | 2975.00 | | 7788 | SCOTT | 3000.00 | | 7876 | ADAMS | 1100.00 | | 7902 | FORD | 3000.00 | +-------+-------+---------+ 5 rows in set (0.00 sec) mysql> select empno,ename,sal from emp where deptno like 20 ; +-------+-------+---------+ | empno | ename | sal | +-------+-------+---------+ | 7369 | SMITH | 800.00 | | 7566 | JONES | 2975.00 | | 7788 | SCOTT | 3000.00 | | 7876 | ADAMS | 1100.00 | | 7902 | FORD | 3000.00 | +-------+-------+---------+ 5 rows in set (0.00 sec) mysql> select empno,ename,sal from emp where ename like 'a%' ; +-------+-------+---------+ | empno | ename | sal | +-------+-------+---------+ | 7499 | ALLEN | 1600.00 | | 7876 | ADAMS | 1100.00 | +-------+-------+---------+ 2 rows in set (0.00 sec) mysql> select * from emp where ename like '__N%'; +-------+-------+-----------+------+------------+---------+------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+-------+-----------+------+------------+---------+------+--------+ | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | +-------+-------+-----------+------+------------+---------+------+--------+ 2 rows in set (0.00 sec) mysql> select deptno as DEPTNO, MAX(sal) as "MAXIMUM SALARY" from emp group by (deptno); +--------+----------------+ | DEPTNO | MAXIMUM SALARY |
  • 5. +--------+----------------+ | 10 | 5000.00 | | 20 | 3000.00 | | 30 | 2850.00 | +--------+----------------+ 3 rows in set (0.00 sec) mysql> select count(sal) from emp where sal=3000; +------------+ | count(sal) | +------------+ | 2 | +------------+ 1 row in set (0.00 sec) mysql> select MAX(sal) from emp; +----------+ | MAX(sal) | +----------+ | 5000.00 | +----------+ 1 row in set (0.00 sec) mysql> select MIN(sal) from emp; +----------+ | MIN(sal) | +----------+ | 800.00 | +----------+ 1 row in set (0.00 sec) mysql> select MIN(sal) least, MAX(sal) max from emp; +--------+---------+ | least | max | +--------+---------+ | 800.00 | 5000.00 | +--------+---------+ 1 row in set (0.00 sec) mysql> select deptno , MIN(sal) "MINIMUM SALARY" from emp group by (deptno); +--------+----------------+ | deptno | MINIMUM SALARY | +--------+----------------+ | 10 | 1300.00 | | 20 | 800.00 | | 30 | 950.00 | +--------+----------------+ 3 rows in set (0.00 sec) mysql> select SUM(sal) totalsal from emp; +----------+ | totalsal | +----------+ | 29025.00 | +----------+ 1 row in set (0.00 sec) mysql> select deptno , SUM(sal) "sal sum" from emp group by (deptno); +--------+----------+ | deptno | sal sum | +--------+----------+ | 10 | 8750.00mysql> select * from t1; +-----+-------+
  • 6. | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | | 20 | 10875.00 | | 30 | 9400.00 | +--------+----------+ 3 rows in set (0.00 sec) mysql> select deptno , avg(sal) "sal avg" from emp group by (deptno); +--------+-------------+ | deptno | sal avg | +--------+-------------+ | 10 | 2916.666667 | | 20 | 2175.000000 | | 30 | 1566.666667 | +--------+-------------+ 3 rows in set (0.00 sec) mysql> select * from emp where job in('CLERK','PRESIDENT'); +-------+--------+-----------+------+------------+---------+------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+------+--------+ 5 rows in set (0.00 sec) mysql> select * from emp where job not in('CLERK','PRESIDENT'); +-------+--------+----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+----------+------+------------+---------+---------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | +-------+--------+----------+------+------------+---------+---------+--------+
  • 7. 9 rows in set (0.00 sec) mysql> select * fromysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) m emp order by comm; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7782 | CLARK | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2;
  • 8. +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | +-------+--------+- mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | 5 | pati | +-----+-------+
  • 9. 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) ----------+------+------------+---------+---------+--------+ 14 rows in set (0.00 sec) mysql> select * from emp where comm <> 'NULL'; +-------+--------+----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+----------+------+------------+---------+---------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | +-------+--------+----------+------+------------+---------+---------+--------+ 3 rows in set, 1 warning (0.00 sec) mysql> select * from emp where comm <> 'NULL' order by comm desc; +-------+--------+----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+----------+------+------------+---------+---------+--------+ | 7654 | MARTIN | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec)
  • 10. mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) sec) SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | +-------+--------+----------+------+------------+---------+---------+--------+ 3 rows in set, 1 warning (0.00 sec) mysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+mysql> select ename, sal from emp where sal between 1000 and 5000; +--------+---------+ | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+
  • 11. | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | | JONES | 2975.00 | | MARTIN | 1250.00 mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 |
  • 12. | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) | ename | sal | +--------+---------+ | ALLEN | 1600.00 | | WARD | 1250.00 | | JONES | 2975.00 | | MARTIN | 1250.00 | | BLAKE | 2850.00 | | CLARK | 2450.00 | | SCOTT | 3000.00 | | KING | 5000.00 | | TURNER | 1500.00 | | ADAMS | 1100.00 | | FORD | 3000.00 | | MILLER | 1300.00 | +--------+---------+ 12 rows in set (0.00 sec) mysql> select empno,ename,job,comm,sal from emp where sal>=1000 and sal<=3000; +-------+--------+----------+---------+---------+ | empno | ename | job | comm | sal | +-------+--------+----------+---------+---------+ | 7499 | ALLEN | SALESMAN | 300.00 | 1600.00 | | 7521 | WARD | SALESMAN | 500.00 | 1250.00 | | 7566 | JONES | MANAGER | NULL | 2975.00 | | 7654 | MARTIN | SALESMAN | 1400.00 | 1250.00 | | 7698 | BLAKE | MANAGER | NULL | 2850.00 | | 7782 | CLARK | MANAGER | NULL | 2450.00 | | 7788 | SCOTT | ANALYST | NULL | 3000.00 | | 7844 | TURNER | SALESMAN | 0.00 | 1500.00 | | 7876 | ADAMS | CLERK | NULL | 1100.00 | | 7902 | FORD | ANALYST | NULL | 3000.00 | | 7934 | MILLER | CLERK | NULL | 1300.00 | +-------+--------+----------+---------+---------+ 11 rows in set (0.00 sec) mysql> select empno,ename,job,comm,sal from emp where sal>=1000 or sal<=3000; +-------+--------+-----------+---------+---------+ | empno | ename | job | comm | sal | +-------+--------+-----------+---------+---------+ | 7369 | SMITH | CLERK | NULL | 800.00 | | 7499 | ALLEN | SALESMAN | 300.00 | 1600.00 | | 7521 | WARD | SALESMAN | 500.00 | 1250.00 | | 7566 | JONES | MANAGER | NULL | 2975.00 | | 7654 | MARTIN | SALESMAN | 1400.00 | 1250.00 | | 7698 | BLAKE | MANAGER | NULL | 2850.00 | | 7782 | CLARK | MANAGER | NULL | 2450.00 | | 7788 | SCOTT | ANALYST | NULL | 3000.00 | | 7839 | KING | PRESIDENT | NULL | 5000.00 | | 7844 | TURNER | SALESMAN | 0.00 | 1500.00 | | 7876 | ADAMS | CLERK | NULL | 1100.00 | | 7900 | JAMES | CLERK | NULL | 950.00 | | 7902 | FORD | ANALYST | NULL | 3000.00 |
  • 13. | 7934 | MILLER | CLERK | NULL | 1300.00 | +-------+--------+-----------+---------+---------+ 14 rows in set (0.00 sec) mysql> select empno,ename,job,comm,sal from emp where not sal=3000; +-------+--------+-----------+---------+---------+ | empno | ename | job | comm | sal | +-------+--------+-----------+---------+---------+ | 7369 | SMITH | CLERK | NULL | 800.00 | | 7499 | ALLEN | SALESMAN | 300.00 | 1600.00 | | 7521 | WARD | SALESMAN | 500.00 | 1250.00 | | 7566 | JONES | MANAGER | NULL | 2975.00 | | 7654 | MARTIN | SALESMAN | 1400.00 | 1250.00 | | 7698 | BLAKE | MANAGER | NULL | 2850.00 | | 7782 | CLARK | MANAGER | NULL | 2450.00 | | 7839 | KING | PRESIDENT | NULL | 5000.00 | | 7844 | TURNER | SALESMAN | 0.00 | 1500.00 | | 7876 | ADAMS | CLERK | NULL | 1100.00 | | 7900 | JAMES | CLERK | NULL | 950.00 | | 7934 | MILLER | CLERK | NULL | 1300.00 | +-------+--------+-----------+---------+---------+ 12 rows in set (0.00 sec) mysql> update emp set comm=520 where empno=7369; Query OK, 1 row affected (0.37 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from emp; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7369 | SMITH | CLERK | 7902 | 1980-12-17 | 800.00 | 520.00 | 20 | | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 | | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+---------+--------+ 14 rows in set (0.00 sec) mysql> delete from emp where empno=7369; Query OK, 1 row affected (0.01 sec) mysql> select * from emp; +-------+--------+-----------+------+------------+---------+---------+--------+ | empno | ename | job | mgr | hiredate | sal | comm | deptno | +-------+--------+-----------+------+------------+---------+---------+--------+ | 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 | | 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 | | 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 | | 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 | | 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 | | 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 | | 7788 | SCOTT | ANALYST | 7566 | 1982-12-09 | 3000.00 | NULL | 20 | | 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 |
  • 14. | 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | 0.00 | 30 | | 7876 | ADAMS | CLERK | 7788 | 1983-01-12 | 1100.00 | NULL | 20 | | 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 | | 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 | | 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 | +-------+--------+-----------+------+------------+---------+---------+--------+ 13 rows in set (0.00 sec) ________________________________________________________________________________ _______ mysql> select * from t1; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 5 rows in set (0.00 sec) mysql> select * from t1 union select * from t2; +-----+-------+ | Rno | Name | +-----+-------+ | 1 | amit | | 2 | rohan | | 3 | rahul | | 4 | Nayan | | 5 | pati | | 6 | xyz | | 7 | pqr | +-----+-------+ 7 rows in set (0.00 sec) mysql> select distinct(Rno) as "Common RollNo" from t1 inner join t2 using(Rno); +---------------+ | Common RollNo | +---------------+ | 3 | | 4 | | 5 | +---------------+ 3 rows in set (0.00 sec)