Doubt dadabase Q


#1

acc. to made easy test series ans is 2500 acc to me it should be 2000.please give me your opinion

Consider the relations r1(P, Q, R) and r2(R, S, T) with primary keys P and R respectively. The relation r1 contains 2000 tuples and r2 contains 2500 tuples. The maximum size of the join r1⋈ r2 is :

2000
2500
4500
5000


#2

you can find amswer of this question at
https://gateoverflow.in/3553/gate2006-it-14