Question: Contest( starter , ender , pointsStarter, pointsEnder, debatedate ) Debater( name , club, age) The relational schema shown above table is a very simple database

Contest(starter, ender, pointsStarter, pointsEnder, debatedate)

Debater(name, club, age)

The relational schema shown above table is a very simple database for a Debating club. In a debating contest, one debater starts and is followed by his opponent who ends the contest. Debaters are both given points by an independent jury. The debater with the most points wins; draws are possible. It is assumed that not all the debaters in Debater relation participate the contest.

The following two Foreign Keys exist in the schema:

FK Contest(starter) references Debater(name)

FK Contest(ender) references Debater(name)

Answer the following questions :-

Please use

(A) the Relational Algebra,

(B) the Domain Relational Calculus and the Domain Relational Calculus.

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