md5password()//案例mysql> select md5('xiaodeng');+----------------------------------+| md5('xiaodeng')                  |+----------------------------------+| accd5818a8547b13180044139260c80d |+----------------------------------+1 row in set (0.09 sec)mysql> select password('xiaodeng');+-------------------------------------------+| password('xiaodeng')                      |+-------------------------------------------+| *37F20A3D69B0CE32DE36C6D57BFB0408A63F80DE |+-------------------------------------------+1 row in set, 1 warning (0.05 sec)