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 

UNIQUE COL Vs PRIMARY KEY

 
Post new topic   Reply to topic   printer-friendly view    MVSFORUMS.com Forum Index -> Database
View previous topic :: View next topic  
Author Message
deepa12
Beginner


Joined: 05 Apr 2005
Posts: 131
Topics: 64
Location: chennai
PostPosted: Fri Jan 27, 2006 4:29 am    Post subject: UNIQUE COL Vs PRIMARY KEY Reply with quote
Am unable to understand why we have both in DB2 in the sense am able to define referential constraint even on unique col.s of a table So why do we have both What is the disadvantage & advantage of each

I cannot insert rows into a table defined with unique col without creating unique index
_________________
deepa
Back to top
View user's profile Send private message Send e-mail
kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12378
Topics: 75
Location: San Jose
PostPosted: Fri Jan 27, 2006 5:40 am    Post subject: Reply with quote
deepa12,

You have been on this site for 8 months now and by now you should be able to follow rules. Please search before posting. Check this link

http://www.mvsforums.com/helpboards/viewtopic.php?p=25345#25345

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