CONCAT() returns NULL if any argument is NULL. : CONCAT : String Functions MySQL TUTORIALS

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CONCAT() returns NULL if any argument is NULL.


mysql>
mysql>
mysql>
mysql> SELECT CONCAT('My', NULL, 'QL');
+--------------------------+
| CONCAT('My', NULL, 'QL') |
+--------------------------+
| NULL                     |
+--------------------------+
1 row in set (0.00 sec)

mysql>



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