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 > 3rd Normal Form

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 12-10-08, 08:26
PoisonousFish PoisonousFish is offline
Registered User
 
Join Date: Dec 2008
Posts: 2
3rd Normal Form

How do I put these Tables in 3rd Normal Form? Thanks for your time

PK = primary key, FK = Foreign Key

tables
VENDOR(Vendor_ID(PK), Address)
PRICE QUOTE(Quote_Quantity(PK), Price)
PART(Item_Number(PK), Description)
PART RECEIPT(Order_Number(PK), Date, Order_Quantity(FK))

Relations
VENDOR 1:Many PRICE QUOTE
PRICE QUOTE 1:Many PART RECEIPT
PART 1:Many PRICE QUOTE
Reply With Quote
  #2 (permalink)  
Old 12-10-08, 08:35
healdem healdem is offline
Jaded Developer
 
Join Date: Nov 2004
Location: out on a limb
Posts: 9,246
I dunno
I tend not to think in terms of 1NF, 2NF, 3NF they are more aimed at learners int he db design pathway
what did your teacher say?
what do your fellow students & pupils say

there are some excellent articles on normalisation, not least
http://www.r937.com\Relational.html
http://www.tonymarston.net/php-mysql...se-design.html

ultimately what do you think
do you think you have pushed your desing toe 3NF, as after all its your homework
__________________
I'd rather be riding my Versys or my Tiger 800 let alone the Norton
Reply With Quote
  #3 (permalink)  
Old 12-10-08, 08:59
gvee gvee is offline
www.gvee.co.uk
 
Join Date: Jan 2007
Location: UK
Posts: 10,156
I always find creating the tables and populating them with sample data a great way to spot potential areas for improvement...
__________________
George
Twitter | Blog
Reply With Quote
  #4 (permalink)  
Old 12-10-08, 10:00
blindman blindman is offline
World Class Flame Warrior
 
Join Date: Jun 2003
Location: Ohio
Posts: 11,726
I find integers way too limiting, and prefer applying fractal dimensions to my databases. My preference is for a normalization level somewhere between 2.8 and 3.1.
__________________
If it's not practically useful, then it's practically useless.

blindman
www.chess.com: "sqlblindman"
Reply With Quote
  #5 (permalink)  
Old 12-10-08, 10:12
gvee gvee is offline
www.gvee.co.uk
 
Join Date: Jan 2007
Location: UK
Posts: 10,156
What's BCNF on that scale?
__________________
George
Twitter | Blog
Reply With Quote
  #6 (permalink)  
Old 12-10-08, 10:32
healdem healdem is offline
Jaded Developer
 
Join Date: Nov 2004
Location: out on a limb
Posts: 9,246
Quote:
Originally Posted by blindman
I find integers way too limiting, and prefer applying fractal dimensions to my databases. My preference is for a normalization level somewhere between 2.8 and 3.1.
i find the lack of precision totally uncool
I try to achieve tolerance to two decimal places
where's your sense of pride in your work
where's that honesty in a good days work for a good days pay.....









...does this need a Mr Winky, or is it merely presumed
__________________
I'd rather be riding my Versys or my Tiger 800 let alone the Norton
Reply With Quote
  #7 (permalink)  
Old 12-10-08, 10:34
Pat Phelan Pat Phelan is offline
Resident Curmudgeon
 
Join Date: Feb 2004
Location: In front of the computer
Posts: 12,605
The normal forms for matter are solid, liquid, and gas. Plasma is arguable, but fun to play with!

-PatP
Reply With Quote
  #8 (permalink)  
Old 12-10-08, 14:04
PoisonousFish PoisonousFish is offline
Registered User
 
Join Date: Dec 2008
Posts: 2
I appreciate the replies guys, I'm not a db expert. I was hoping that one of you might walk me through the process of coverting it to 3rd normal form ^_^
Reply With Quote
  #9 (permalink)  
Old 12-10-08, 14:25
blindman blindman is offline
World Class Flame Warrior
 
Join Date: Jun 2003
Location: Ohio
Posts: 11,726
You should just have to add the relations to the tables, and they will be in 3rd normal form.
__________________
If it's not practically useful, then it's practically useless.

blindman
www.chess.com: "sqlblindman"
Reply With Quote
  #10 (permalink)  
Old 12-10-08, 23:48
r937 r937 is offline
SQL Consultant
 
Join Date: Apr 2002
Location: Toronto, Canada
Posts: 19,524
Quote:
Originally Posted by PoisonousFish
I was hoping that one of you might walk me through the process of coverting it to 3rd normal form ^_^
when is this assignment due?

i could walk you through this some time late next week...
__________________
r937.com | rudy.ca
please visit Simply SQL and buy my book
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