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AFAIK, it is functionally the same as a view - the WITH ... AS (...) is executed on the fly, as is the SQL statement stored in a VIEW. The only difference is, this is not stored in an LF. A view has nothing but the statement to be executed - no index, nada, no access plan, etc.

Vern

At 12:02 PM 1/6/2004 -0500, you wrote:
Not quite a view, but very similar, and lightning fast, was this:
WITH
  TEMPTABLE (IPROD) AS
    (SELECT IPROD
       FROM IIM
       GROUP BY IPROD
       HAVING COUNT(*)>1)
SELECT TEMPTABLE.IPROD, RRN(A)
  FROM TEMPTABLE, IIM A
  WHERE TEMPTABLE.IPROD = A.IPROD

Rob Berendt

"Fisher, Don" <Dfisher@xxxxxxxxxxxxxxxxx>
Sent by: midrange-l-bounces@xxxxxxxxxxxx
01/06/2004 11:34 AM
Please respond to
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>

Subject
RE: Using SQL to check for duplicate records

Have you tried this?
Create View IPRODDups as
    SELECT IPROD FROM IIM group by IPROD
    Having count(*) > 1
Select IPROD,RRN(IIM) A join IPRODDups B
    on A.IPROD = B.IPROD order by A.IPROD

I've discovered that creating views can dramatically reduce the execution
time of SQL statements in some circumstances.

Donald R. Fisher, III
Project Manager
Roomstore Furniture Company
(804) 784-7600 extension 2124
DFisher@xxxxxxxxxxxxx



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