DELETE FROM `pre_ucenter_pm_lists` WHERE 1 ;DELETE FROM `pre_ucenter_pm_members` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_0` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_1` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_2` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_3` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_4` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_5` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_6` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_7` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_8` WHERE 1 ;DELETE FROM `pre_ucenter_pm_messages_9` WHERE 1 ;