mysql lower()函数

 

mysql> select " DFREF"; +--------+
| DFREF  |
+--------+
|  DFREF |
+--------+
1 row in set (0.00 sec) 
 mysql> select lower(" DFREF"); +-----------------+
| lower(" DFREF") |
+-----------------+
|  dfref          |
+-----------------+
1 row in set (0.00 sec)