Select records by comparing subsets
- by devnull
Given two tables (the rows in each table are distinct):
1) x | y z 2) x | y z
------- --- ------- ---
1 | a a 1 | a a
1 | b b 1 | b b
2 | a 1 | c
2 | b 2 | a
2 | c 2 | b
2 | c
Is there a way to select the…