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Question 61Asked in BPSC TRE 1.0 (2023) Computer Science Class 11-12

How many primary keys can be there in a table?

  1. AOnly 1
  2. BOnly 2
  3. CDepends on number of columns
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) Only 1

Explanation

A table can have only one primary key, although that key may be made of several columns (a composite key).

From BPSC TRE 1.0 (2023) Computer Science Class 11-12 — Previous Year Paper

This is question 61 of BPSC TRE 1.0 (2023) Computer Science Class 11-12 — Previous Year Paper. 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.