How to join two tables by multiple columns in SQL?

Question

I have two tables named Evaluation and Value.

In both tables, there are four columns. But three of the four are the same. In other words, th

Answer 1

You should only need to do a single join:

SELECT e.Grade, v.Score, e.CaseNum, e.FileNum, e.ActivityNum
FROM Evaluation e
INNER JOIN Value v ON e.CaseNum = v.CaseNum AND e.FileNum = v.FileNum AND e.ActivityNum = v.ActivityNum