Solved

DataBase design

Posted on 2014-12-02
6
107 Views
Last Modified: 2014-12-22
I am creating a database for a driving school. I Need some idea about linking cars/instructors/locations.

So i thing I need to have a hub where I can store some cars. And the instructor get assigned to the car. Instructor can be assigner to many hubs as well as multiple locations. The question is do i better of assigning instructor to a particular location  or a car?
0
Comment
Question by:erikTsomik
  • 2
  • 2
  • 2
6 Comments
 
LVL 65

Expert Comment

by:Jim Horn
ID: 40477008
Just out of wild curiosity, if you 'need some idea', then how'd you get the job?
0
 
LVL 19

Author Comment

by:erikTsomik
ID: 40477023
I am not asking for idea, I am interesting on different opinions
0
 
LVL 65

Accepted Solution

by:
Jim Horn earned 250 total points
ID: 40477050
Tell you what ... you paint us a picture as to why this question is not homework using words other than 'this isn't homework', and we'll cough up some opinions.

EE is a technical question and answer site, and not a homework site, so we can help you understand design concepts, or answer specific questions, but we're not about to flat-out do your homework for you.

My first opinion though is the questions you're asking are usually handled in the requirements analysis phase of a project, where developers will interview the business analyst and/or clients to ask details as to what they want built, so that design can begin.  It's dangerous for a developer to assume (ass-u-me) relationships between tables without a solid basis in requirements.
0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 
LVL 69

Assisted Solution

by:Scott Pletcher
Scott Pletcher earned 250 total points
ID: 40477098
>> So i thin[k] I need to have a hub where I can store some cars. <<

Hmm, I would expect the vehicles (more generic, so I prefer it to cars, who says you can't teach someone to drive a truck or even a motorcycle at some point) to be stored at the locations.  Did the company owners / managers indicate something about a "hub" for vehicles of some sort?

Interesting.  You'll have to decide if you want to treat a "hub" as a type of location or as a completely separate entity from location.  Look at the attributes and properties and see how similar or dissimilar they are.


>> And the instructor get assigned to the car. <<

And location, yes.  But I'd put a date and time on this.  An instructor could certainly use different vehicles on the same day, even potentially in different locations (particularly since you could drive Student A from one location to another, then add Student B to drive back to the original location).

I'd definitely use separate, relationship tables for these vehicle/location, instructor/location, instructor/vehicle, etc., combinations rather than trying to put them in the base/"master" tables.
0
 
LVL 19

Author Comment

by:erikTsomik
ID: 40477112
The hub can also be a training location not just a storage.
0
 
LVL 69

Expert Comment

by:Scott Pletcher
ID: 40477118
Then I'd definitely treat "hub" as just a subtype of a "location", i.e., just add a "location_type" to the location table to indicate location | hub | <whatever>.
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

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

I'm trying, I really am. But I've seen so many wrong approaches involving date(time) boundaries I despair about my inability to explain it. I've seen quite a few recently that define a non-leap year as 364 days, or 366 days and the list goes on. …
As technology users and professionals, we’re always learning. Our universal interest in advancing our knowledge of the trade is unmatched by most industries. It’s a curiosity that makes sense, given the climate of change. Within that, there lies a…
Via a live example combined with referencing Books Online, show some of the information that can be extracted from the Catalog Views in SQL Server.
Viewers will learn how to use the UPDATE and DELETE statements to change or remove existing data from their tables. Make a table: Update a specific column given a specific row using the UPDATE statement: Remove a set of values using the DELETE s…

770 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