psql (9.6.7, server 11.3) on linux I want to do something like this (intentionally bad sql but will illustrate the need)
select s.name,s.grade from students s where s.class='math' union select 'whole class', class_grade from all_classes where class=s.class Of course it's that "where class=s.class" that's a foul. In English, I want a list of each math student and their grade and then append one more record for the entire class, a record that comes from a different table but narrowed down to that one class. I don't care if union isn't the right approach. Anything that works is welcome ! Thanks in Advance
