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...
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
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?
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.
For More Information
- Dozens more answers to tough SQL questions from Rudy Limeback.
- The Best SQL Web Links: tips, tutorials, scripts, and more.
- Have an SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
- Ask your technical SQL questions -- or help out your peers by answering them -- in our live discussion forums.
- Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.
Dig Deeper on Oracle and SQL
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.