user warning: Subquery returns more than 1 row query: SELECT no.nid,no.title,no.type FROM node AS no WHERE ( no.uid =0 OR no.uid= ( SELECT if(n.uid=0,tp.extra_student,n.uid) FROM thesis_project AS tp INNER JOIN node AS n ON tp.nid=n.nid WHERE tp.extra_student=0 OR n.uid=0 ) ) in /opt/drupal/includes/database.mysql.inc on line 172.