GATE | GATE-CS-2001 | Question 50

Consider a relation geq which represents “greater than or equal to”, that is, (x,y) ∈ geq only if y >= x.

create table geq
( 
  ib integer not null
  ub integer not null
  primary key 1b
  foreign key (ub) references geq on delete cascade 
)

Which of the following is possible if a tuple (x,y) is deleted?

(A)

A tuple (z,w) with z > y is deleted

(B)

A tuple (z,w) with z > x is deleted

(C)

A tuple (z,w) with w < x is deleted

(D)

The deletion of (x,y) is prohibited

Answer

Please comment below if you find anything wrong in the above post
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