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Question 100Asked in DSSSB PGT Computer Science (Technical), 11 Jul 2021

Write the name of the relational algebra operation as per the given order of their notation.

Write the name of the relational algebra operation as per the given order of their notation. Π, X, σ
  1. AProjection, Cartesian product, division
  2. BProjection, Cartesian product, select
  3. CIntersection join, outer join, select
  4. DProjection, outer join, select
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Correct answer: (B) Projection, Cartesian product, select

Explanation

Π is projection (choose columns), × is Cartesian product, and σ is selection (choose rows).

From DSSSB PGT Computer Science PYQ (Technical), 11 Jul 2021

This is question 100 of DSSSB PGT Computer Science PYQ (Technical), 11 Jul 2021. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.