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3 years ago

9

Describe how you would define the relation Brother-in-Law whose tuples have the form (x, y) with x being the brother-in-law of y

. b. Give appropriate relational algebra and SQL expressions that return the relation Brother-in-Law.

Computers and Technology

1 answer:

damaskus [11]3 years ago

8 0

Answer:

The expression is :

π[cd) + π(g,h) ],[π(e,f)+π(a,b)])

We will use foreign key and primary key

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