Select Different Values from Same Column in MySQL

To select different values on the basis of condition, use CASE statement. Let us first create a table −

mysql> create table DemoTable
(
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   Name varchar(40),
Score int
) ;
Query OK, 0 rows affected (0.54 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable(Name,Score) values('Chris',45);
Query OK, 1 row affected (0.24 sec)
mysql> insert into DemoTable(Name,Score) values('David',68);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(Name,Score) values('Robert',89);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(Name,Score) values('Bob',34);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable(Name,Score) values('Sam',66);
Query OK, 1 row affected (0.22 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+----+--------+-------+
| Id | Name   | Score |
+----+--------+-------+
|  1 | Chris  |    45 |
|  2 | David  |    68 |
|  3 | Robert |    89 |
|  4 | Bob    |    34 |
|  5 | Sam    |    66 |
+----+--------+-------+
5 rows in set (0.00 sec)

Following is the query to select different values from same column −

mysql> select Score,
   case when Score < 40 then Score end as ' Score Less than 40',
   case when Score between 60 and 70 then Score end as 'Score Between 60 and 70 ',
   case when Score > 80 then Score end as 'Score greater than 80'
   from DemoTable;

This will produce the following output −

+-------+--------------------+--------------------------+-----------------------+
| Score | Score Less than 40 | Score Between 60 and 70  | Score greater than 80 |
+-------+--------------------+--------------------------+-----------------------+
|    45 |               NULL |                     NULL |                  NULL |
|    68 |               NULL |                       68 |                  NULL |
|    89 |               NULL |                     NULL |                    89 |
|    34 |                 34 |                     NULL |                  NULL |
|    66 |               NULL |                       66 |                  NULL |
+-------+--------------------+--------------------------+-----------------------+
5 rows in set, 1 warning (0.03 sec)