Exercise 5.2.1: Here are two relations: R(A,B): {(0,1), (2,3), (0,1), (2,4), (3,4)} S(B,C): {(0,1), (2,4), (2,5), (3,4), (0,2), (3,4)} Compute the following: a) 7ta+b.a^bK-R); b) ttb + i.c -i^ ); c ) tb,a{R); d) tb,c(S)\ e) S(R); f) 6{S); g) 7a, sum(b)CR); h) 7b,atg(C)(5); ! i) 7a(-R); U) 7a,mi(C)(R xi S); k) .RcSi^S; \)R & r S ; m) R tS S; n) R cSi r . b < s . b S.

I tried to copy it form Database Systems: The Complete Book, Second Edition Page 222

5.2.8 Exercises for Section 5.2

Exercise 5.2.1: Here are two relations: R(A,B): {(0,1), (2,3), (0,1), (2,4), (3,4)} S(B,C): {(0,1), (2,4), (2,5), (3,4), (0,2), (3,4)}