× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.



-----Message d'origine-----
[mailto:midrange-l-bounces@xxxxxxxxxxxx] De la part de Evan Harris
Envoyé : mercredi 31 mars 2010 13:20
À : 'Midrange Systems Technical Discussion'
Objet : RE: SQL Delete from table where rows found in a join

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 ... ?

Ok, you asked for it. Here's my select :

with t as (
SELECT fld1, fld2, fld3, MAX(fld4) lmax FROM myfile GROUP BY
fld1, fld2, fld3)

select a.* from myfile a join t on
a.fld1=t.fld1 and
a.fld2=t.fld2 and
a.fld3=t.fld3 and
a.fld4=t.lmax
join otherFile m on m.fld1= a.fld1 and m.fld2=a.fld2
where a.fld4 ='.'


Now how do I delete ?!

As an Amazon Associate we earn from qualifying purchases.

This thread ...

Follow-Ups:
Replies:

Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.