IS NULL

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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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