Question

This query returns exactly the office tuples I need to delete.

    SELECT id, reference FROM office o 
WHERE o.id NOT IN 
    (SELECT c.office_id FROM Contract c  WHERE office_id IS NOT NULL)
AND o.reference IN 
    (SELECT o.reference FROM Contract c JOIN office o ON c.office_id = o.id  WHERE office_id IS NOT NULL);

But when I write the query

    DELETE FROM office 
WHERE id NOT IN 
    (SELECT c.office_id FROM Contract c  WHERE office_id IS NOT NULL)
AND reference IN 
    (SELECT o.reference FROM Contract c JOIN office o ON c.office_id = o.id  WHERE office_id IS NOT NULL);

I have the following error : #1093 - You can't specify target table 'office' for update in FROM clause

But I really don’t see how to solve this..

Any help would be much appreciated!

Answer 1

try

 DELETE FROM office 
 WHERE id NOT IN 
(SELECT c.office_id FROM Contract c
 WHERE office_id IS NOT NULL)
 AND reference IN 
(select * from (SELECT o.reference FROM Contract c 
 JOIN office o ON c.office_id = o.id 
 WHERE office_id   IS NOT NULL) x);

since you can’t delete from a table where you are selecting from. But using

select * from (select col from your_table) x

should do the trick