RE: gnarly delete statement?

From: Mohan, Ross <MohanR_at_STARS-SMI.com>
Date: Fri, 02 Nov 2001 08:27:23 -0800
Message-ID: <F001.003BB729.20011102084154@fatcity.com>

Naw...Paul is a Major NYC DBA...he
doesn't need *any* coddling whatsoever.

He can parse his way out of any wet
paper bag......

-----Original Message-----
Sent: Friday, November 02, 2001 11:05 AM To: Multiple recipients of list ORACLE-L

Go easy Ross....I'm a Developer too... ;o)

Be gentle with him..LOL

-----Original Message-----
Sent: 02 November 2001 15:30
To: Multiple recipients of list ORACLE-L

Well, that's certainly productive!

hmmm.....so you're a DEVELOPER, eh?

hehhehheh

time for Plan B: make their life
hell until they relent and give you
some breathing room. As a Senior
DBA, you are perfectly placed to do
this!

<EG>

-----Original Message-----
Sent: Friday, November 02, 2001 9:55 AM
To: Multiple recipients of list ORACLE-L

Unfortunately, no. I'm working on the application development side; the "real" DBAs are in another department and the usual turf-protection attitudes apply.

"Mohan, Ross" <MohanR_at_STARS-SMI.com> wrote:
> don't suppose you can properly
> normalize the tables through
> materialized views and update
> the "pk" through that, eh?
>
> -----Original Message-----
> Sent: Thursday, November 01, 2001 3:56 PM
> To: Multiple recipients of list ORACLE-L
>
>
> Given a business rule that says a combination of three columns must
> be
> unique if and only if a fourth column equals a certain value, and if
> the table in question contains rows that violate this requirement,
> I'm
> trying to write a single SQL statement that will remove the
> duplicates.
> Of each set of duplicate rows, I'll delete the one with the latest
> insert timestamp.
>
> Let's call the columns
>
> a b c d timestamp
>
> The combination of b, c, and d must be unique if a = 2.
>
> I can get the duplicate row values along with the latest timestamp
> via
>
> select max(tstamp), a, b, c from
> my_table group by a, b, c having count(*) > 1
>
> But I can't figure out how to use that in a delete statement.
>
> Suggestions greatly appreciated!
>
>
> Paul Baumgartel
>
>
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Author: Paul Baumgartel
  INET: treegarden_at_yahoo.com

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Author: Mohan, Ross
  INET: MohanR_at_STARS-SMI.com

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Author: Mohan, Ross
  INET: MohanR_at_STARS-SMI.com

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Received on Fri Nov 02 2001 - 10:27:23 CST