postgresql7.3 select eg.grade_plural_name, eg.grade_id from evaluation_gradesx eg, acs_objects ao where content_revision__is_live(eg.grade_id) = true and eg.item_id = ao.object_id and ao.context_id = :package_id order by grade_plural_name desc select evaluation__class_total_grade(:user_id,:package_id) select sum(et.weight*eg.weight)/100 from evaluation_gradesi eg, evaluation_tasks et, acs_objects ao where eg.grade_id = et.grade_id and eg.item_id = ao.object_id and ao.context_id = :package_id and content_revision__is_live(eg.grade_id) = true and content_revision__is_live(et.task_id) = true