Топ-100
 

IS

База данных: MySQL
Текст

Syntax:
IS boolean_value

Tests a value against a boolean value, where boolean_value can be TRUE,
FALSE, or UNKNOWN.

URL: https://dev.mysql.com/doc/refman/8.0/en/comparison-operators.html

Пример

mysql> SELECT 1 IS TRUE, 0 IS FALSE, NULL IS UNKNOWN;
-> 1, 1, 1