× 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 2017

Re: SQL Performance issues questions

<Darryl>
I have a simple SELECT with JOIN retrieving the data.
</Darryl>

... not too much of information, but there are some guidelines:
- a view won't change anything
- be sure, that the join fields have same type
- be sure that there is an index for the fields of your where clause
- you could try to force index usage for the larger part of the Resultset b an order by clause
- in a program in some cases it could help to force selectivity before the join operation by joining 2 extracts
- use database monitor over your application to find the candidates for optimization (optimization of queries that are fast enough or queries that are not critical is wasted time)

D*B

As an Amazon Associate we earn from qualifying purchases.

This thread ...
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.