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PLEASE help! ER -Diagrams [message #103283] Mon, 28 April 2003 05:38 Go to next message
Maria
Messages: 57
Registered: August 1999
Member
Hello.
I have the following problem in building an ER diagram for a library.
The library has the following members : professors,
undergraduate students,postgraduate students
and material : books, cd/roms, vidocassetes.

A member can borrow a book (date of borrowing and date of return are kept)
but each member has certain rights for borrowing. For example professors can borrow
up to 10 books for 90 days,postgraduate up to 7 books for 60 days.
if I have a realtionship borrows as following :

members --> borrows <-- books and borrows has as attributes "date of borrowing"
and "date of return" where should I put the rights of borrowing ;
Should I make relationships as

professor -->rights <-- books
postgraduate --> rights <-- books
students --> rights <-- books

Can a certain relationship ( here rights) be associated with 3 different entities ;

How can I handle this ;

Any help could be really valuable to me.
Thank you in advance
Re: PLEASE help! ER -Diagrams [message #103566 is a reply to message #103283] Sat, 17 January 2004 02:35 Go to previous messageGo to next message
sujatha
Messages: 15
Registered: May 1999
Junior Member
er diagram for library
Re: PLEASE help! ER -Diagrams [message #103814 is a reply to message #103566] Wed, 24 March 2004 20:57 Go to previous messageGo to next message
Julia
Messages: 30
Registered: December 1999
Member
please draw me a er diagram of a soccer team and one of the library.
thanks
Re: PLEASE help! ER -Diagrams [message #103827 is a reply to message #103814] Tue, 30 March 2004 03:25 Go to previous messageGo to next message
rehaam
Messages: 1
Registered: March 2004
Junior Member
please want er diagram for library of books at university and data flow diagaram
Re: PLEASE help! ER -Diagrams [message #104013 is a reply to message #103827] Thu, 24 June 2004 12:24 Go to previous messageGo to next message
vinod shivhare
Messages: 1
Registered: June 2004
Junior Member
Hi,

I have DFD for Library of universities/college. but it is in .doc format. so send me a mail in my id after that i will send u as a attachment, becoz right now there is not any option to attch the file.

bye
vinod kumar
Re:PLEASE help; ER Diagram [message #104072 is a reply to message #103814] Tue, 20 July 2004 17:46 Go to previous messageGo to next message
Zweety
Messages: 1
Registered: July 2004
Junior Member
please can you draw the diagram of entity relationship diagram with it's definition...

i'm asking this because of our tutorial is due on this friday....

i hope you help me on tis diagram...

zweety...
Re: PLEASE help! ER -Diagrams [message #104575 is a reply to message #103566] Thu, 02 December 2004 17:30 Go to previous messageGo to next message
ashfaq
Messages: 2
Registered: August 2002
Junior Member
hi,
we need an ER Diagram for library managemnt software. we are thankful if any help concerning our problem is supplied to us.
thanks.
Re: PLEASE help! ER -Diagrams [message #109532 is a reply to message #104575] Fri, 25 February 2005 04:11 Go to previous messageGo to next message
parvateesam
Messages: 1
Registered: February 2005
Junior Member
hi plese send ER diagrams
icon7.gif  hi [message #146332 is a reply to message #104013] Wed, 09 November 2005 22:34 Go to previous message
imindian
Messages: 1
Registered: November 2005
Junior Member
Embarassed

[Updated on: Thu, 10 November 2005 07:46]

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