ISNULL
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Returns true if the value is NULL.
Syntax
ISNULL (val)(val IS NULL)
Arguments
-
val: any object
Return Type
Boolean
Examples
SELECT ISNULL(NULL), ISNULL(0), (NULL + 0 is NULL), (0 is NULL);
+--------------+-----------+--------------------+-------------+
| ISNULL(NULL) | ISNULL(0) | (NULL + 0 is NULL) | (0 is NULL) |
+--------------+-----------+--------------------+-------------+
| 1 | 0 | 1 | 0 |
+--------------+-----------+--------------------+-------------+Last modified: February 24, 2023