mysql upper() 函数
mysql> select upper(" cdcdcd"); +------------------+ | upper(" cdcdcd") | +------------------+ | CDCDCD | +------------------+ 1 row in set (0.00 sec)
mysql> select upper(" cdcdcd"); +------------------+ | upper(" cdcdcd") | +------------------+ | CDCDCD | +------------------+ 1 row in set (0.00 sec)