Multi-Table Delete
Explore the use of multi-table delete queries in SQL to remove data from related tables simultaneously. Understand both older and newer syntax forms, see practical examples including conditional deletions, and gain insight into limitations such as the prohibition of ORDER BY and LIMIT clauses with multi-table deletes. This lesson helps you manage complex data deletions across tables effectively.
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Multi-Table Delete
We know how to delete data from a single table, however, if you are confronted with a situation where you want to delete data from one table and also any related data from other tables, you can employ the multi-table delete queries. An example scenario can be that when we delete an actor from our Actors table we also want all rows in the DigitalAssets table belonging to the deleted actor removed too.
Older Syntax
DELETE T1, T2
FROM T1, T2, T3
WHERE <condition>
Newer Syntax
Use the newer syntax as it reads better:
DELETE FROM T1 ...