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GATE DBMS Practice Test - Relational Algebra & Database Design

Question 1 of 10

In SQL, a relation can contain null values, and comparisons with null values are treated as unknown. If all the comparisons with null values are treated as false, which of the following pairs is equivalent?

  1. x = 10 not (not x = 10)
  2. x = 10, x > 9 and x < 11, where x is an integer
  3. x $\ne$ 10 not (x = 10)
  4. Both (1) and (2)

Prize Money

15₹7 Crores
14₹1 Crore
13₹50,00,000
12₹25,00,000
11₹12,50,000
10₹6,40,000
9₹3,20,000
8₹1,60,000
7₹80,000
6₹40,000
5₹20,000
4₹10,000
3₹5,000
2₹2,000
1₹1,000