The Ultimate Guide to High Availability with MariaDB

NULLIF

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Syntax

NULLIF(expr1,expr2)

Contents

  1. Syntax
  2. Description
  3. Examples
  4. See Also

Description

Returns NULL if expr1 = expr2 is true, otherwise returns expr1. This is the same as CASE WHEN expr1 = expr2 THEN NULL ELSE expr1 END.

Examples

SELECT NULLIF(1,1);
+-------------+
| NULLIF(1,1) |
+-------------+
|        NULL |
+-------------+

SELECT NULLIF(1,2);
+-------------+
| NULLIF(1,2) |
+-------------+
|           1 |
+-------------+

See Also

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