Delete records without matching records

I have a one to many relationship in my database.
I would like to delete records in one table if there are no matching records in another table.

Cheers

Stu

If you are using a version earlier then 4.0 you are out of luck..you will need to do it in a script.

If after 4.0 you could do something like

DELETE FROM table1 WHERE table1_id NOT IN (SELECT distinct table1_id FROM table2)

remember to do a dump before doing any mass deletes though...