Print three result sets, each a single title column:
- translated books that were also released in 2021 or later;
- books that are translated, released in 2021 or later, or both;
- translated books released before 2021.
Use INTERSECT, UNION and EXCEPT, not joins.
Expected: 4, 6 and 1 rows. The single row in the last set is At Night All Blood Is Black. Set operations need compatible columns on both sides, and they drop duplicate rows unless you say ALL.