If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

 
Go Back  dBforums > General > Database Concepts & Design > help with functional dependency / candidate keys

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 11-22-10, 15:45
joanna_cph joanna_cph is offline
Registered User
 
Join Date: Nov 2010
Posts: 1
help with functional dependency / candidate keys

Hi guys I have the following assignment to solve :
1. Let schema R = (A;B;C;D;E), with the following set of functional dependencies F:
A →BC
EB → C
CD → E
B → D
E → A
(a) List all candidate keys for R (4 points).

I don't want the solution just an explanation where should I start . what is the algorithm for find the candidate keys ? should I use Armstrongs' axioms and list the atributtes that appear on L.H.S. and R.H.S. or ????

Thanks
Reply With Quote
  #2 (permalink)  
Old 11-26-10, 08:26
pootle flump pootle flump is offline
King of Understatement
 
Join Date: Feb 2004
Location: One Flump in One Place
Posts: 14,905
Moving to DB Concepts
__________________
Testimonial:
Quote:
pootle flump
ur codings are working excelent.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On