postgresql7.2 select user_id, first_names, last_name, email from dotlrn_users where lower(last_name) like lower('%' || :search_text || '%') or lower(first_names) like lower('%' || :search_text || '%') or lower(email) like lower('%' || :search_text || '%') and user_id not in (select user_id from dotlrn_member_rels_full where community_id = :community_id)