Nested Subqueries MCQ

Test your knowledge with important Nested Subqueries MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Nested Subqueries MCQs at Bissoy

• SQL subqueries that can occur wherever a value is permitted provided the subquery gives only one tuple with a single attribute are called _________
  ক

  Exact Subqueries

  খ

  Vector Subqueries

  গ

  Positive Subqueries

  ঘ

  Scalar Subqueries
• State true or false: We can use Subqueries inside the from clause
  ক

  True

  খ

  False
• The _________ construct returns true if the argument in the sub-query is void of duplicates
  ক

  not null

  খ

  not unique

  গ

  unique

  ঘ

  null
• What is a correlated sub-query?
  ক

  An independent query that uses the correlation name of another independent query.

  খ

  A sub-query that uses the correlation name of an outer query

  গ

  A sub-query that substitutes the names of the outer query

  ঘ

  A sub-query that does not depend on its outer query’s correlation names
• The ______ construct returns true if a given tuple is present in the subquery.
  ক

  not exists

  খ

  present

  গ

  not present

  ঘ

  exists
• The ________ comparison checker is used to check “each and every” condition
  ক

  all

  খ

  and

  গ

  every

  ঘ

  each
• State true or false : Nested Subqueries cannot be used for comparing two different sets
  ক

  True

  খ

  False
• If a set is a collection of values given by the select clause, The ______ connective tests for set membership
  ক

  within

  খ

  include

  গ

  under

  ঘ

  in
• What is a subquery?
  ক

  A subquery is a select-from-where expression that is nested within another query

  খ

  A subquery is any query that is nested within another query

  গ

  A subquery is a relation that is externally specified which can be used to handle data in queries

  ঘ

  A subquery is a condition that excludes all the invalid tuples from the database