Are circular relationships not advised in Access?

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Guest

I have a series of many-to-may relationships that can be traced in a circular
fashion - is this likely to cause problems?
 
The real world can always cause problems. Example: Places are connected to
places by bus routes. It is quite possible to get into a real mess when
trying to work out how to get from A to B. It is up to the designer to
forsee and cope with any difficulties.
 
=?Utf-8?B?SmFjayBhdCBSZWxheGVk?= <Jack at
(e-mail address removed)> wrote in
I have a series of many-to-may relationships that can be traced in a
circular fashion - is this likely to cause problems?
Click to expand...

No; as long as the relationships themselves (a) make sense and (b) don't
duplicate themselves.

Think of Students who have Registrations with Courses that are Supervised
by Tutors.

Studs -< Regist >- Courses -< Super >- Tutors

Now, Students may be allocated individual Tutors too

Studs >- Tutors

Now, there are two possible queries: <which students are allocated to
Tutor Eric?> and <which student attend courses supervised by Tutor
Eric?>. Both possible, both sensible, but only one of them correct in any
specific situation.

If you see what I mean.
B Wishes


Tim F
 
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