Question

Basically, I have three tables

workplaces with a field id (the one of which i want to delete the associated data), and a participantlist_id that identifies the participant list.

participantlist – just list_id and name

participantlist_links – with list_id and participant_id

the query that i’m trying to use is this:

DELETE FROM workplaces,
participantlist,
participantlist_links 
WHERE workplaces.id =  '8' AND 
      workplaces.participantlist_id = participantlist_links.list_id AND  
      workplaces.participantlist_id = participantlist.list_id

but i get:

MySQL said:

1064 – You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘WHERE workplaces.id=’8′ AND workplaces.participantlist_id = participant’ at line 3

any ideas?

SOLUTION:

    DELETE t1, t2, t3
    FROM workplaces AS t1
    LEFT JOIN participantlist AS t2 ON t1.participantlist_id = t2.list_id
    LEFT JOIN participantlist_links AS t3 ON t2.list_id = t3.list_id
    WHERE t1.id = '8'

Answer 1

You can use JOIN to delete from multiple tables like this:

DELETE t1, t2 FROM t1 INNER JOIN t2 INNER JOIN t3
WHERE t1.id=t2.id AND t2.id=t3.id;

http://dev.mysql.com/doc/refman/5.5/en/delete.html