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IS « Comparison Functions Operators « MySQL Tutorial
MySQL Tutorial
Comparison Functions Operators
IS
15.10.IS
15.10.1.
IS 'boolean_value': Tests a value against a boolean value, where boolean_value can be TRUE, FALSE, or UNKNOWN
15.10.2.
IS NOT 'boolean_value': Tests a value against a boolean value, where boolean_value can be TRUE, FALSE, or UNKNOWN