Let us first create a table −
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(100), Score int ); Query OK, 0 rows affected (1.10 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(Name,Score) values('John',45); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Name,Score) values('Chris',null); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Name,Score) values('David',null); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(Name,Score) values('Bob',1); Query OK, 1 row affected (0.11 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+----+-------+-------+ | Id | Name | Score | +----+-------+-------+ | 1 | John | 45 | | 2 | Chris | NULL | | 3 | David | NULL | | 4 | Bob | 1 | +----+-------+-------+ 4 rows in set (0.00 sec)
Following is the query to display records on the basis of conditions IS NULL OR !=1 −
mysql> select *from DemoTable where Score IS NULL OR Score!=1;
This will produce the following output −
+----+-------+-------+ | Id | Name | Score | +----+-------+-------+ | 1 | John | 45 | | 2 | Chris | NULL | | 3 | David | NULL | +----+-------+-------+ 3 rows in set (0.00 sec)