Discuz! Database Error

SELECT a.* FROM common_member_profile a LEFT JOIN common_member_verify b ON b.uid=a.uid LEFT JOIN common_userportrait c ON c.uid=a.uid WHERE a.qyzt=1 AND a.tradekind='电子元器件' AND a.company <>'' AND a.birthcity='滁州市' AND (a.company LIKE '%温度传感器%' OR a.tradekind='温度传感器' OR a.tradeinfo='温度传感器' OR a.tradeall='温度传感器' OR a.mainproducts1='温度传感器' OR a.mainproducts2='温度传感器' OR a.mainproducts3='温度传感器' OR a.mainproducts4='温度传感器' OR a.mainproducts5='温度传感器' OR a.mainproducts6='温度传感器' OR c.portrait LIKE '%温度传感器%') ORDER BY CASE WHEN b.verify3=1 THEN b.verifytime3 END DESC,CASE WHEN b.verify2=1 THEN b.verifytime2 END DESC,CASE WHEN b.verify1=1 THEN b.verifytime END DESC LIMIT 0,15