You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and id_cat= order by stt asc' at line 1syntax error: select * from table_product_item where hienthi=1 and tenkhongdau='xe-tai-chien-thang-315-tan-3t15-thung-dai-3m65-942' and id_list= and id_cat= order by stt asc