MVSFORUMS.com Forum Index MVSFORUMS.com
A Community of and for MVS Professionals
 
 FAQFAQ   SearchSearch   Quick Manuals   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Union in Select and program performance

 
Post new topic   Reply to topic   printer-friendly view    MVSFORUMS.com Forum Index -> Database
View previous topic :: View next topic  
Author Message
Jamylady
Beginner


Joined: 04 Nov 2004
Posts: 68
Topics: 22
PostPosted: Wed Apr 12, 2006 12:11 pm    Post subject: Union in Select and program performance Reply with quote
I have to select records from 4 different tables and hence I used a cursort with UNION. But will it affect the performance of the program?

Could some one advice?
Thanks
JA
Back to top
View user's profile Send private message
kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12376
Topics: 75
Location: San Jose
PostPosted: Wed Apr 12, 2006 1:38 pm    Post subject: Reply with quote
Jamylady,

You haven't provided any details about the indexes involved in the queries.

Please go thru this excellent FAQ to measure the performance of your sql.

http://www.mvsforums.com/helpboards/viewtopic.php?t=587&highlight=performance

Hope this helps....

Cheers

Kolusu
_________________
Kolusu
www.linkedin.com/in/kolusu
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic   printer-friendly view    MVSFORUMS.com Forum Index -> Database All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


MVSFORUMS
Powered by phpBB © 2001, 2005 phpBB Group