GATE | GATE-CS-2015 (Set 2) | Question 65

Consider two relations R1(A, B) with the tuples (1, 5), (3, 7) and R1(A, C) = (1, 7), (4, 9). Assume that R(A,B,C) is the full natural outer join of R1 and R2. Consider the following tuples of the form (A,B,C)

  a = (1, 5, null),
  b = (1, null, 7), 
  c = (3, null, 9), 
  d = (4, 7, null), 
  e = (1, 5, 7), 
  f = (3, 7, null), 
  g = (4, null, 9).

Which one of the following statements is correct?

(A)

R contains a, b, e, f, g but not c, d

(B)

R contains a, b, c, d, e, f, g

(C)

R contains e, f, g but not a, b

(D)

R contains e but not f, g

Answer

Please comment below if you find anything wrong in the above post
Feeling lost in the world of random DSA topics, wasting time without progress? It's time for a change! Join our DSA course, where we'll guide you on an exciting journey to master DSA efficiently and on schedule.
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 geeks!

Last Updated :

Share your thoughts in the comments

GeeksforGeeks

Trending in News