DELETE using values from another table

I am using MS Access. I have two tables: A and B. A has the fields ID, DATE and others. B has the field ID and others. The tables are related by the field ID. I need to eliminate some records of B depending of the value of DATE of A. How can I do this?

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There are two methods. The first uses WHERE EXISTS syntax:

delete from B
 where exists
       ( select 1 from A
          where ID = B.ID
            and [DATE] = #2002-09-28# )

The second method uses WHERE IN syntax:

delete from B
 where ID in
       ( select ID from A
          where [DATE] = #2002-09-28# )

Both methods are equivalent.

By the way, I used square brackets around the column called DATE. I would strongly urge you not to name your columns using a reserved word. That's just asking for trouble, like syntax errors.

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This was first published in October 2002

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