Warning: mysqli_query(): (21000/1242): Subquery returns more than 1 row in /hermes/bosnacweb04/bosnacweb04ac/b1073/ipg.alexdigitalstudiocom/osheqplanet.com/wordpress/wp-includes/class-wpdb.php on line 2459

WordPress database error: [Subquery returns more than 1 row]
select *,(select 'Register' from usercourse where crsID = ucCourseID and ucUserID = 0 ) as Register from courses where crsType like 'classroom' order by crsPrice;