How to insert or update rows in one statement: Databases for Developers #17

Sometimes when adding rows to your database need update-if-exists, insert-if-not-exists logic. Aka an upsert.

You could write this as separate update and insert statements. But there is an easier way:

Merge!

Watch this video for an overview of how merge works.

Further reading:

Merge documentation: https://docs.oracle.com/en/database/o...

Delete rows not in the source using merge: https://technology.amis.nl/2006/10/14...

Take the course: https://devgym.oracle.com/pls/apex/dg...

Need help with SQL? Ask us over on AskTOM: https://asktom.oracle.com

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All Things SQL blog: https://blogs.oracle.com/sql/

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The Magic of SQL with Chris Saxon

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