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Hi David

It looks like you are SELECTing a list so you can then use it as input to a
join to the same table to delete the rows you selected ?

Why not just DETE FROM t WHERE ... ?

Regards
Evan Harris


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of David FOXWELL
Sent: Wednesday, 31 March 2010 8:52 p.m.
To: Midrange Systems Technical Discussion
Subject: SQL Delete from table where rows found in a join

Hi,

I want to update and delete using the result of a join. If I create a table
first containing the rows to modify can I safely join to it for the update
or delete?

Like so :

Get lines to delete/update.
CREATE TABLE qtemp/RRN as (
with t as (
select statement)


select rrn(a) rrn from myfile a join t on
join conditions )

with data


Followed by :

Delete from myfile where rrn(myfile) in (select *from qtemp/rrn).

Maybe there's an easier way?

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