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Database Systems MCQs – Practice Test 14 (Chapter 15)

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Free Introduction to SQL MCQ App Download (Android & iOS): To apply the aggregate function not only to a single set of tuples, but to a group of sets of tuples using the; MCQ with answers: group by clause, grouped clause, merge clause, and avg clause. Practice View of Data Quiz Questions, download Apple Book (Free Chapter) to advance digital coursework.

Introduction to SQL MCQ – Practice Test 14 PDF Download

MCQ 66: If a correlation name is defined both locally in a subquery and globally in a containing query:

  1. Local definition is applied
  2. Global definition is applied
  3. No definition applied
  4. Global and local definitions applied

MCQ 67: To apply the aggregate function not only to a single set of tuples, but to a group of sets of tuples; using the:

  1. Grouped clause
  2. Group by clause
  3. Merge clause
  4. Avg clause

MCQ 68: For testing whether a subquery has duplicate tuples in its result, SQL includes a:

  1. Comparison function
  2. Boolean Function
  3. Aggregate Function
  4. Induced function

MCQ 69: The number of error(s) in the following query is/are:
select count (*)
from course:

  1. 1
  2. 2
  3. 4
  4. 6

MCQ 70: Including commands for specifying constraints that the data stored in the database must satisfy, is said to be the:

  1. Authorization
  2. View definition
  3. Integrity
  4. View declaration

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