Solved

Should I create a separte table for this?

Posted on 2011-03-10
5
220 Views
Last Modified: 2012-05-11
Trying to adhere to the normalization rule in cleaning up and re-design this database.  If I have a history table that has a history_Type column that currently stores varchar of the type.  Should I create a new table as History_Type with HistoryTypeId primary key as identity column and the a 2nd column as Type_Name as varchar.  Then change the History table to hold the HistoryTypeId  instead?  Thanks.
0
Comment
Question by:lapucca
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 35101926

You are exactly correct.
That will be the best way to go about it.
0
 

Author Comment

by:lapucca
ID: 35101967
So, by implementing it this way, is this conforming to NF2?  thanks.
0
 
LVL 32

Accepted Solution

by:
Ephraim Wangoya earned 400 total points
ID: 35101978

Correct
0
 
LVL 29

Assisted Solution

by:Paul Jackson
Paul Jackson earned 100 total points
ID: 35101980
The reason why this would probably be a good idea is if you wanted to retrieve items from the history table based on the historytypeid as it will improve performance.
As for normilization rules moving this in to a separate table conforms with 2NF mormalization rule : Remove subsets of data that apply to multiple rows of a table and place them in separate tables.

0
 

Author Closing Comment

by:lapucca
ID: 35102020
Thank you both.  Jacko, thank you for the detail infro.  Since ew has answered both my questions hence I'm spliting up the points this way.  But I appreciate both your help.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction: When running hybrid database environments, you often need to query some data from a remote db of any type, while being connected to your MS SQL Server database. Problems start when you try to combine that with some "user input" pass…
If you find yourself in this situation “I have used SELECT DISTINCT but I’m getting duplicates” then I'm sorry to say you are using the wrong SQL technique as it only does one thing which is: produces whole rows that are unique. If the results you a…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question