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Editorial Team
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Asked: 2026-05-27T13:59:48+00:00

I have two tables, events and locations . Each has a column named venue_id

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I have two tables, events and locations. Each has a column named venue_id to match an event to the correct location. venue_id is not the primary key.

What query could I run to delete the rows in locations that have no event linked to them?

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1 Answer

  1. Editorial Team

    This should do it :

    DELETE FROM locations WHERE venue_id
NOT IN (SELECT DISTINCT venue_id FROM events)
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