Loi cau lenh truy van: SELECT * FROM tbtaikhoan WHERE taikhoan_trangthai=1 ORDER BY (SELECT COUNT(tbsanpham.taikhoan_id) as soluongtin FROM tbsanpham WHERE tbsanpham.taikhoan_id = tbtaikhoan.taikhoan_id AND sanpham_trangthai=1) DESC LIMIT 5