Re: Using SQL for File Record Comparison

["Michael Ryan" <michaelrtr@xxxxxxxxx>]

And that's true...but that one quick statement in Interactive SQL
seems so inviting. :)

On 3/7/07, DeLong, Eric <EDeLong@xxxxxxxxxxxxxxx> wrote:
> I don't think this plays to SQL's strengths.  You'd be able to do this fairly 
> easily with the RPG cycle, using primary/secondary files by matching keys.  RPG 
> lets you compare the record format data, so only one test is needed to 
> determine whether the primary and secondary records are alike.
>
> The cycle is not really necessary, but it plays nicely with your 
> requirements....
>
> JMO,
> Eric
>
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Michael Ryan
> Sent: Wednesday, March 07, 2007 11:28 AM
> To: Midrange Systems Technical Discussion
> Subject: Using SQL for File Record Comparison
>
>
> Does this make sense? Is there a better way? I'm trying to find out if
> two files are the same. Here's my SQL statement:
>
> SELECT count(*) FROM firstlib/mhrdclp a, secondlib/mhrdclp b where
> a.mdvnda = b.mdvnda and a.mdmdl = b.mdmdl and (a.mddual <> b.mddual
> or a.MDCMFRT <> b.MDCMFRT or a.MDLP <> b.MDLP or a.MDSF <> b.MDSF)
>
> File MHRDCLP has the following fields:
> mdvnda
> mdmdl
> mddual
> mdcmfrt
> mdlp
> mdsf
>
> I want to see if I have any records that match mdvnda and mdmdl have
> any of the other four fields different.
>
> Thanks!
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