> [snip]
> I am using MySQL with a PHP front end. Is there a better way to delete
> from multiple tables than the following?
> $result=mysql_query("DELETE FROM team WHERE team_id = '$team_id'");
> $result=mysql_query("DELETE FROM conflicts WHERE team_id =
> '$team_id'");
> $result=mysql_query("DELETE FROM home_field WHERE team_id =
> '$team_id'");
> [/snip]
>
> This is where MySQL currently fails on of the 12 rules of an RDBMS..it has
> not the ability to CASCADE and true table relatons are lacking. I have
> always handled it in the code, like you have done above, until
> MySQL becomes
> more robust in it's query features...
If you're using MySQL 4.0.x, you can do:
DELETE team, conflicts, home_field FROM team, conflicts, home_field WHERE
team.team_id = conflicts.team_id AND team.team_id = home_field.team_id AND
team.team_id = '$team_id'
In 3.23.50+ and 4.0.2+ InnoDB supports ON DELETE CASCADE, and ON DELETE SET
NULL, so you wouldn't even need the multi-table delete.
-JF
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