MedVision ad

One-to-many, many-to-many, one-to-one (1 Viewer)

endingstory

New Member
Joined
Feb 1, 2007
Messages
20
Gender
Male
HSC
2008
I am having trouble understanding how to work out the relationships between entities and their attributes, and how they are linked.

I understand the concepts of one-to-many, many-to-many, and one-to-one but i can't apply them!

http://www4.boardofstudies.nsw.edu....wer=D&courseID=15210&testQuestionID=121071630

Could somebody please explain to me how the solution is solved, and why it has to link to a certain attribute?

thanks :)

====

also could some ppl tell me some examples of metadata (info about data)?
 
Last edited:

emytaylor164

Active Member
Joined
Feb 13, 2007
Messages
1,736
Gender
Female
HSC
N/A
here is an example
with that example
Say you are a member
you can hire many movies on that 1 membership (thus one to many)
you have1 membership ID to one membership name(one to one)
many people can hire many movies (many to many)


Hope that has helped.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top