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 > Booking and Billing Relational Database ERD

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 03-23-11, 07:53
EddieTheGent EddieTheGent is offline
Registered User
 
Join Date: Mar 2011
Posts: 3
Booking and Billing Relational Database ERD

Hi, so I figured no one could be bothered trying to understand my last attempt at explaining the problem that I'm having. Soooo, I drew it out in an ERD to try and explain it better. I applogise for the roughness of the ERD, it's the first one that I've ever drawn, and I had to do it in paint. Any advice that can be offered as to the workability of what I've designed, or how I could improve the design will be greatly appeciated. Also, is it possible/sensible for me to join tables on the forigen keys like I have?

The key is as follows:

# - Primary Key
* - Mandatory
+ - Optional

I've just realised that there should probably be one for forigen keys too, so if me marking them down is essential to you being able to help me, please let me know.

Thanks,

Eddie.

ERD: ImageShack® - Online Photo and Video Hosting
Reply With Quote
  #2 (permalink)  
Old 03-23-11, 13:58
EddieTheGent EddieTheGent is offline
Registered User
 
Join Date: Mar 2011
Posts: 3
I've just realized...

That it's a bit stupid of me to be trying to store data as many times as I am. I've figured out a way to link the tables without any repeating data, except from the 'Courses ID' feild, which has to go on the 'Courses' table, 'Resources' table, and the 'Booking' table. Is this still wrong? I'll update the ERD within a few hours reflecting the changes.
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