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Tip of the Day
Language: SQL Server
Expertise: Beginner
Apr 9, 1997

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DELETE FROM With a Subquery

Question:
How can I delete all data from a table using a join? For example, the SELECT statement would be:
        SELECT *  FROM Master AS A, Detail AS B
                WHERE A.price > 100 AND B.id = A.id 
What is the corresponding DELETE statement for this?

Answer:
If your database supports the standard for subqueries in the DELETE FROM statement, you can construct it this way:

        DELETE FROM Detail
                WHERE id IN
                        (SELECT id FROM Master
                        WHERE price > 100);
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