Hi.
On Mon, Oct 01, 2001 at 04:48:36PM -0400, [EMAIL PROTECTED] wrote:
> I'm trying to remove rows from one table where a column matches another
> column in a seperate table..
>
> I have mysql 3.22.32:
>
> DELETE TemporaryUsers_ToMessWith.* FROM TemporaryUsers_ToMessWith,
> Advantage_Backup WHERE Advantage_Backup.TempAccountNumber =
> TemporaryUsers_ToMessWith.TempAccountNumber AND
> TemporaryUsers_ToMessWith.TempAccountNumber <> 0;
>
> I tried that and then realized I need mysql 4.0.0 or higher to do that kind
> of query.
>
> I don't want to delete from multiple tables, just one, but I need to match
> it with the 2nd table there.. so how would I go about writing that query?
[...]
This would also be considered a multi-table-delete, which will work
only in the upcoming 4.0. In 3.23.x the delete statement may only
refer to one table.
Best is probably to do this with a programming language: first select
the ids of all rows in questions
SELECT tu.Id
FROM TemporaryUsers_ToMessWith AS tu,
Advantage_Backup AS ab
WHERE ab.TempAccountNumber = tu.TempAccountNumber AND
tu.TempAccountNumber <> 0;
then issue one large
DELETE FROM TemporaryUsers_ToMessWith WHERE id in (<your id list>)
Of course, that presumes that you have an reasonable id in your table,
which you have, don't you? ;-)
Bye,
Benjamin.
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