postgresql7.1 select a.title, a.user_id, a.first_names, a.last_name, to_char(cs.completed_datetime, :format) as completed_datetime, to_char(coalesce(cs.last_mod_datetime, ns.last_mod_datetime), :format) as last_mod_datetime, coalesce(cs.subject_id, ns.subject_id) as subject_id, coalesce(cs.session_id, ns.session_id) as session_id, cs.percent_score, a.last_name || ', ' || a.first_names as subject_name from (select a.assessment_id, cr.title, cr.item_id, cr.revision_id, u.user_id, u.first_names, u.last_name from as_assessments a, cr_revisions cr, cr_items ci, acs_users_all u where a.assessment_id = cr.revision_id and cr.revision_id = ci.latest_revision and ci.parent_id = :folder_id and u.user_id <> 0 and acs_permission__permission_p(:assessment_id, u.user_id, 'read') and acs_group__member_p(u.user_id, :group_id, 't') ) a left join (select as_sessions.*, cr.item_id from as_sessions, cr_revisions cr where session_id in (select max(session_id) from as_sessions, acs_objects o where not completed_datetime is null and o.object_id = session_id and o.package_id = :package_id group by subject_id, assessment_id ) and revision_id=assessment_id) cs on (a.user_id = cs.subject_id and a.item_id = cs.item_id) left join (select * from as_sessions where session_id in (select max(session_id) from as_sessions, acs_objects o where completed_datetime is null and o.object_id = session_id and o.package_id = :package_id group by subject_id, assessment_id)) ns on (a.user_id = ns.subject_id and a.assessment_id = ns.assessment_id) where true [list::filter_where_clauses -and -name "results"] order by lower(a.title), lower(a.last_name), lower(a.first_names)