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MySQL | IS
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schedule Jul 1, 2022
Last updated MySQL
Tags 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 |+-----------------+
Published by Arthur Yanagisawa
Edited by 0 others
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Official MySQL Documentation
https://dev.mysql.com/doc/refman/8.0/en/comparison-operators.html#operator_is
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