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Version: Latest-3.3

isnull

Description

Checks whether the value is NULL, returns 1 if it is NULL, and returns 0 if it is not NULL.

Syntax

ISNULL(v)

Parameters

  • v: the value to check. All date types is supported.

Return value

Returns 1 if it is NULL, and returns 0 if it is not NULL.

Example

MYSQL > SELECT c1, isnull(c1) FROM t1;
+------+--------------+
| c1 | `c1` IS NULL |
+------+--------------+
| NULL | 1 |
| 1 | 0 |
+------+--------------+