what is the difference between "derived relation" &"expression relation" in DataBase ?

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2007-10-29 20:28:10 · 1 answers · asked by tah_om9 1 in Computers & Internet ➔ Programming & Design

I will appreciate it,if you express these two relations with an example for each one,thanx!

2007-10-29 20:41:43 · update #1

Derived relation is out of your own control and expression relation is what God gave us cont role of

2007-10-29 20:41:45 · answer #1 · answered by saveitok 6 · 0⤊ 0⤋