author: zahran halim

From Databases to Hypermedia: With 26 CAI Lessons

... free variable whenever it occurs in an Apha command . Let us look at a ... result relation WA . Customer C # Cname Ccity Cphone 1 Codd London 2263035 2 Martin ... A.P # = B.P # And B.C # = 2 The associated tuples satisfying the WFF above ...

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