IS NULL
Sintassi
IS NULL
Spiegazione
Controlla se un valore è NULL.
Esempi
MariaDB [(none)]> SELECT 1 IS NULL, 0 IS NULL, NULL IS NULL; +-----------+-----------+--------------+ | 1 IS NULL | 0 IS NULL | NULL IS NULL | +-----------+-----------+--------------+ | 0 | 0 | 1 | +-----------+-----------+--------------+ 1 row in set (0.00 sec) MariaDB [(none)]>
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