Function MySQL

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  4. SELECT ISNULL(NULL), ISNULL(0), ISNULL(1)
mysql>
mysql>
mysql> SELECT ISNULL(NULL), ISNULL(0), ISNULL(1);
+--------------+-----------+-----------+
| ISNULL(NULL) | ISNULL(0) | ISNULL(1) |
+--------------+-----------+-----------+
|            1 |         0 |         0 |
+--------------+-----------+-----------+
1 row in set (0.00 sec)