1. mysql GROUP_CONCAT() uses sorting...
SELECT shop.id, shop.name, shop.user_id, shop.address, shop.map_location, shop.lyl, shop.introduce, -- 0 unclaimed, 1 claimed shop.is_renling, GROUP_CONCAT(img_url ORDER BY sb.sort DESC ) -- write sort here...not at the end FROM tc_shop shop LEFT JOIN tc_shop_banner sb ON shop.id = sb.shop_id WHERE shop.id = 31 AND shop.is_shenhe = 1 AND shop.inblack = 0