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MySQL | IS

Database
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MySQL
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Documentation
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Operators
schedule Jul 1, 2022
Last updated
local_offer MySQL
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tocTable of Contents
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MySQL's IS operator performs a test against a boolean value and returns 1 if the test evaluates to true, 0 otherwise.

NOTE

The boolean value can be one of: TRUE, FALSE, UNKNOWN

Syntax

SELECT value IS TRUE | FALSE | UNKNOWN;

Example

To check whether 'test' is TRUE:

SELECT 'test' IS TRUE;
+----------------+
| 'test' IS TRUE |
+----------------+
| 0 |
+----------------+

To check whether 1 is TRUE:

SELECT 1 IS TRUE;
+-----------+
| 1 IS TRUE |
+-----------+
| 1 |
+-----------+

To check whether NULL is UNKNOWN:

SELECT NULL IS UNKNOWN;
+-----------------+
| NULL IS UNKNOWN |
+-----------------+
| 1 |
+-----------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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