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Database Systems MCQs – Practice Test 14 (Chapter 10)

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The MCQ: In domain relational calculus, all values that appear in tuples of the expression are values from; "Database Systems MCQ" App (Android, iOS) with answers: domain, views, relation, and aggregation to learn online courses. Practice Concurrency Control Concept in DBMS Quiz Questions, download Apple Book (Free Chapter) for associates in computer science.

Formal Relational Query Languages MCQ – Practice Test 14 PDF Download

MCQ 66: In domain relational calculus, all values that appear in tuples of the expression are values from:

  1. Views
  2. Domain
  3. Relation
  4. Aggregation

MCQ 67: A tuple-relational-calculus expression may generate a/an:

  1. Finite relation
  2. Infinite relation
  3. Invalid relation
  4. Composite relation

MCQ 68: A query expression in the tuple relational calculus is done as:

  1. {p| P(t)}
  2. {p| t(p)}
  3. {t| P(t)}
  4. {p| t(t)}

MCQ 69: We can avoid the loss of information by performing:

  1. Natural join
  2. Outer join
  3. Full join
  4. Inner join

MCQ 70: At the result of the left outer join, the present information is from the:

  1. Right relation
  2. Left relation
  3. Combination of relations
  4. Left and right relation

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