× 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.


  1.  Home
  2. MIDRANGE-L
  3. November 2005

Re: Select Results in a DB2 statement

On Thu, 2005-11-10 at 09:53 -0500, Brian Piotrowski wrote:
> Hi All,
> 
>  
> 
> I have an SQL statement that has this:
> 
>  
> 
> select * from SST30 where spplcd ='2' and
> 
> concat(char(spcrdt),char(spcrtm)) >='20051103600' and
> 
> concat(char(spcrdt),char(spcrtm)) <='20051104200'
> 
> order by spcrdt, spcrtm
> 
>  
> 
Don't use an expression to select the records, it results in a table
scan.

select * from SST30 where spplcd = '2' and
(spcrdt > 20051103 or
  (spcrdt > 20051103 and spcrtm >= 0600))
and
(spcrdt < 20051104 or
  (spcrdt = 20051104 and spcrtm <= 0200))

This was discussed several days ago.  If you have indexes on the fields,
the optimizer may be able to select the records without a table scan.

As an Amazon Associate we earn from qualifying purchases.

This thread ...
Follow-Ups:
Replies:
Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 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.