SQL Query : < SELECT Mt.code, Mt.name, Mt.title, Mt.hit, Mt.divider, Mt.reg_time, date_format( Mt.reg_date, '%y/%m/%d' ) AS reg_date, COUNT( Ct.parent_code ) AS cmtnum FROM MgBD_question AS Mt LEFT OUTER JOIN MgBD_question_CM AS Ct ON Mt.code = Ct.parent_code WHERE Mt.usenotice <> ISNULL(Mt.usenotice) GROUP BY Mt.code ORDER BY Mt.porder DESC >\n Error (Count : 5 ) \n Got error 28 from storage engine