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Database Systems MCQs – Practice Test 38 (Chapter 21)

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The "SQL Concepts and Queries MCQ" App Download (Android & iOS): Join that do not preserve non matched tuples are called; MCQ with answers: inner join, outer join, left inner join, and left outer join. Practice Database Authorization Quiz Questions, download Apple Book (Free Chapter) to enhance virtual instruction.

SQL Concepts and Queries MCQ – Practice Test 38 PDF Download

MCQ 186: To specify the number of fractional digits for seconds, a variant is used, known as:

  1. t(P)
  2. time(p)
  3. date(p)
  4. date(s)

MCQ 187: The join that do not preserve non matched tuples are called:

  1. Outer join
  2. Inner join
  3. Left inner join
  4. Left outer join

MCQ 188: Complex check conditions can be useful when we want to ensure integrity of data, but may be:

  1. Cheap
  2. Not accurate
  3. Not implementable
  4. Costly

MCQ 189: A view is updatable, if any attribute's value can be set to null if it is not listed in the:

  1. Select clause
  2. Where clause
  3. Having clause
  4. From clause

MCQ 190: The database system stores the query expression associated with the:

  1. View
  2. View definition
  3. View relation
  4. View schema

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