Use the IS NULL and IS NOT NULL operators : Null : Data Type SQL / MySQL

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SQL / MySQL » Data Type » Null »

Use the IS NULL and IS NOT NULL operators



/*
mysql> SELECT 1 IS NULL, 1 IS NOT NULL;
+-----------+---------------+
| 1 IS NULL | 1 IS NOT NULL |
+-----------+---------------+
|         0 |             1 |
+-----------+---------------+
1 row in set (0.00 sec)


*/  
SELECT 1 IS NULL, 1 IS NOT NULL;