SQL Query : < 
SELECT Mt.code, Mt.name, Mt.secret, Mt.title, 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.porder > '20200' 
GROUP BY Mt.code ORDER BY Mt.porder LIMIT 2 >\n Error (Count : 5 ) \n Got error 28 from storage engine