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 ' tags) and type='sanpham' and hienthi=1 order by stt,id desc' at line 1syntax error: SELECT count(id) AS numrows FROM table_product where FIND_IN_SET(, tags) and type='sanpham' and hienthi=1 order by stt,id desc