Database Query error!
De fout: 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 'ORDER BY inst_naam' at line 1
In query: SELECT si_opl_waar.*, si_opl_instelling.inst_naam, si_opl_instelling.inst_index FROM si_opl_waar, si_opl_instelling WHERE waar_inst_id = inst_id AND waar_opl_id = ORDER BY inst_naam