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 'union all select * from (select c1.id, c1.name, s1.id as id1, s1.name as name1 f' at line 1db_selectYou have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'union all select * from (select c1.id, c1.name, s1.id as id1, s1.name as name1 f' at line 1db_RowsYou have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'union all select * from (select c1.id, c1.name, s1.id as id1, s1.name as name1 f' at line 1db_Fetch