can't connect datebase:iask Error:Unknown system variable 'NAMES' select classname,parentpath,child,iszs,content,welcome,userid,parentid,dateandtime from class where id=804Error:Unknown system variable 'NAMES' select classname from class where id=Error:Unknown system variable 'NAMES' select count(id) from topic where instr(concat(',',minor_class_path,','),',804,')>0Error:Unknown system variable 'NAMES' select id,title,parentid,offer,replycount,passtime,lastposttime,minor_class_id from topic where instr(concat(',',minor_class_path,','),',804,')>0 order by lastposttime desc limit 0,20
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