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1:批量删除回帖 pre_forum_post 表中存储的是论坛帖子和回复。每增加一个帖子或者回复,pid值+1.  
first值为1的,代表是主题。first值为0的,代表是回帖。  
delete from pre_forum_post where pid>3 and pid<16283795 and first=0;  
2:批量删除用户签名  
update pre_common_member_field_forum set sightml='';  
3:批量删除N天前的用户短消息  
DELETE FROM pre_ucenter_pm_messages_0 WHERE dateline < 1353327620 ;  
时间戳可以从这里转换 [url=http://tool.chinaz.com/Tools/unixtime.aspx]http://tool.chinaz.com/Tools/unixtime.aspx[/url]  
4:调整某个帖子的点击数  
UPDATE cdb_threads SET views=点击数 WHERE tid=主题编号;  
UPDATE `cdb_forums` SET `allowmediacode` = '1'  
5:一次性关闭板块fid20帖子  
UPDATE `cdb_threads` SET `closed` = '1' WHERE `fid` =20 ; 
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