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select id,pid,title,modelid,exlink,pic,lang,syn,dismode,catdir from `yunyehui_category` where `pid`= 0 and lang= and isdisplay=1 and status=1 and title<>'' order by `ordernum` asc ,`id` asc

MySQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and isdisplay=1 and status=1 and title<>'' order by `ordernum` asc ,`id` asc' at line 1
MySQL Errno: 1064
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