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Which of the following keyword is used to eliminate duplicates from the SQL query?
  • a)
    remove
  • b)
    distinct
  • c)
    unique
  • d)
    not null
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following keyword is used to eliminate duplicates from th...
In the formal, mathematical definition of the relational model is in the form of 'relation is a set'. Thus, duplicate tuples would never appear in relations. In practice, duplicate elimination is time-consuming. Therefore, SQL allows duplicates in relations as well as in the results of SQL expressions. 'distinct' keyword is used to eliminate duplicates from the SQL query.
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Which of the following keyword is used to eliminate duplicates from the SQL query?a)removeb)distinctc)uniqued)not nullCorrect answer is option 'B'. Can you explain this answer?
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