Re: Deleting detail records with SQL -- MIDRANGE-L

× 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.

Try:

Delete from DETAIL Where invoice in ( Select invoice from HEADER2 )

This is for deleting all the detail records that have a HEADER2, in the second select you can put a where if you need to delete only the detail for the records that meet a condiction in header2.

Luis Rodriguez wrote:

Hi list,

A coworker gave me the following SQL problem:

I need to erase all the detail from certain records from a header based file. Something like:

Delete from DETAIL Where exists( Select 1 from HEADER2 where DETAIL.invoice = HEADER2.invoice)

DETAIL has a lot more records than HEADER2. HEADER2 and DETAIL have indexes by invoice.
So far, so good. Now, it seems that the system does read (explore) the entire DETAIL file in the process (a quite lengthy process).

If I were to do this with RPG, I would reverse the file order. I would read HEADER2, position DETAIL by key and, with an inside loop, delete all the records where the invoice numbers coincide. Is there any way to emulate this behavior with SQL?

Thanks,

Luis Rodriguez

IBM Certified Systems Expert
eServer i5 iSeries Technical Solutions

This mailing list archive is Copyright 1997-2025 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.