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Urgent Homework
This query will return all of the records in the right table (tableY) that do not match any records in the left table (tableX).
SELECT "select_list"
FROM TableX X
RIGHT JOIN TableY Y
ON X.Key = Y.Key
WHERE X.Key IS NULL
SELECT X.PK, X.Value,
Y.Value, Y.PK
FROM TableX X
RIGHT JOIN TableY Y
ON X.PK = Y.PK
WHERE X.PK IS NULL
The types of JOIN you can use and the differences between them,
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