Use IS NOT NULL to display only NOT NULL records. Let us first create a table −
mysql> create table DemoTable -> ( -> FirstName varchar(100) -> ); Query OK, 0 rows affected (3.01 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('John');
Query OK, 1 row affected (0.44 sec)
mysql> insert into DemoTable values(NULL);
Query OK, 1 row affected (0.58 sec)
mysql> insert into DemoTable values('Chris');
Query OK, 1 row affected (0.31 sec)
mysql> insert into DemoTable values(NULL);
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable values('Robert');
Query OK, 1 row affected (0.34 sec)
mysql> insert into DemoTable values(NULL);
Query OK, 1 row affected (0.23 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-----------+ | FirstName | +-----------+ | John | | NULL | | Chris | | NULL | | Robert | | NULL | +-----------+ 6 rows in set (0.00 sec)
Following is the query to display records ignoring NULL −
mysql> select *from DemoTable where FirstName IS NOT NULL;
This will produce the following output −
+-----------+ | FirstName | +-----------+ | John | | Chris | | Robert | +-----------+ 3 rows in set (0.02 sec)
