Re: Removing duplicate records

[John McKee <jmmckee@xxxxxxxxxxxxxx>]

Perfect Alan.   Exactly what I needed, and an explanation so I could
understand what was happening.  Just ran it and it dropped alf the
records in the file.  I will verify against a backup, but it looks a
lot better.  And, an article to save as well.

Luis, this looks a lot like what you had.  I can't see your message
right now, but I think you used a CTE.  In any event, it is a small
file.  Easy enough to verify.

Thanks all so much,

John McKee

On Fri, Jan 20, 2012 at 8:55 AM, Alan Shore <ashore@xxxxxxxx> wrote:
> Hi John
> Try this web page
> http://www.systeminetwork.com/article/databasesql/deleting-records-with-duplicate-data----the-easy-way-60700
>
> Alan Shore
> Programmer/Analyst, Direct Response
> E:AShore@xxxxxxxx
> P:(631) 200-5019
> C:(631) 880-8640
> "If you're going through Hell, keep going" - Winston Churchill
>
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of John McKee
> Sent: Friday, January 20, 2012 9:45 AM
> To: Midrange Systems Technical Discussion
> Subject: Removing duplicate records
>
> During testing, I was real careful to clear this work file before each run.  Managed to have one of "those" moments and failed to clear it prior to a production run.  Result is that every record that should be in the file once is in the file twice.
>
> Is there a way to remove duplicate records with SQL?  They are completely identical.  However, if it makes the process any simpler, the account number is guaranteed to not be used twice.  Now, of course, had that field been described with DDS keyword UNIQUE, there wouldn't be an issue.
>
> I can see possible ways to fix it, but would rather not have to wonder if I actually made it worse.
>
> Thanks,
>
> John McKee
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