If the parameter of the QUOTE() function is NULL, MySQL will return NULL.
mysql> Select QUOTE(NULL); +-------------+ | QUOTE(NULL) | +-------------+ | NULL +-------------+ 1 row in set (0.00 sec) mysql> Select Name, QUOTE(NULL) from student where id = 1; +--------+-------------+ | Name | QUOTE(NULL) | +--------+-------------+ | Gaurav | NULL | +--------+-------------+ 1 row in set (0.08 sec)
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