Statement SELECT questi.ssname,queans.ssname FROM queres, questi,queans WHERE queres.idperson= AND queres.idqueans = queans.id AND queres.idquesti = questi.id ; failed: (1064) You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'AND queres.idqueans = queans.id AND queres.idquesti = questi.id' at line 1