super_si

just revising and this has cropped up my notes arent clear!

also The three levels of the ANSI/SPARC architecture would be useful


Si

MartinM

You have started many threads on Scoobynet. Each of the threads you have started is only started by you. The relationship between you and the threads you have started is one-to-many.

Many people have contributed to many of the threads you have started. Any particular thread has many contributors. The relationship between people and the threads they have contributed to is many-to-many.

You can model a one-to-many data relationship in a physical database by putting a foreign key in the 'many' table that points back to the primary key in the 'one' table'.

You can't do this in a many-to-many data relationship. You need a 'linking' table that contains two foreign keys - one to the primary key of one of the tables and one to the primary key of the other table.

Easy eh?

PS Damn - I've broken my rule of never replying to any of your threads since you dissed me so much last time. But you did ask the other day to point out any simple questions you've ever asked on Scoobynet....

DazV

super_si

i do appologies for last time, sorry!

Sometimes i get really pissed off with damm computers!!

Were you reffering to when i did the little Vb ADO program?

Thanks for the help very useful now to revise backus naurs form ,parse tables and finite Automata's

Si

suba

LOL .

MartinM

Ref your 2nd question.

http://www.cs.stir.ac.uk/~ahu/31q5/lecture2.pdf

..very (well, a little bit actually) interesting. Can't say I've ever come across it in any real world applications though..

super_si

cheers mate


Wished id gone there lot easier

http://www.cs.ncl.ac.uk

Tutor said were rated in the top 5, which is a bugger because its hard

druddle

Si

Look at this for SPARC info - http://www.sparc.com/

If you want any more info on these buggers which are the same as these buggers but the FSC ones are sold in Europe then let me know

Dave

super_si

cheers mate! Off to bed just just an exam on Software Architecure next year ive a whole module on database

Got nick for hardware/networking/quake3, gary for java, Hos for a laugh, Whats your msn id, your my database monkey

Forgot my mate Mark(Gravel Express, cruise person )

Si

[Edited by super_si - 8/28/2002 11:54:48 PM]

druddle

si - my MSN handle is the same as my email addy !

dave