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Database Systems MCQs – Practice Test 10 (Chapter 15)

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The "Introduction to SQL MCQ" App Download (iOS & Android): Operation that outputs all tuples from its first input that do not occur in the second input, is said to be; MCQ with answers: the union operation, the except operation, the intersection all operation, and the intersection operation. Practice View of Data Quiz Questions, download Apple Book (Free Chapter) to enhance academic DBMS.

Introduction to SQL MCQ – Practice Test 10 PDF Download

MCQ 46: The result of Boolean expression not unknown is:

  1. Unknown
  2. True
  3. False
  4. Null

MCQ 47: The operation that outputs all tuples from its first input that do not occur in the second input, is said to be:

  1. The Except Operation
  2. The Union Operation
  3. The Intersection all Operation
  4. The Intersection Operation

MCQ 48: It is also possible to test for membership in an:

  1. Arbitrary relation
  2. Irrational relation
  3. Unreasoned relation
  4. Autocratic relation

MCQ 49: After groups have been formed, SQL applies predicates in the:

  1. Like clause
  2. Select clause
  3. Define clause
  4. Having clause

MCQ 50: According to the scoping rule, it is legal to use only correlation names defined in the:

  1. Subquery itself
  2. Query that contains subquery
  3. Subquery of another query
  4. Both A and B

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