mysql lower()函数

mysql> select " DFREF";

+--------+

| DFREF  |

+--------+

|  DFREF |

+--------+

 row in set (0.00 sec)



mysql> select lower(" DFREF");

+-----------------+

| lower(" DFREF") |

+-----------------+

|  dfref          |

+-----------------+

 row in set (0.00 sec)