Database Systems MCQs (Computer Science) From Textbook

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Database Systems Certification MCQs – Mock Test 47

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Modification of Database MCQs – Mock Test 47 PDF Download

MCQ: 231

SQL supports basic set operations on relations that includes

  1. Union
  2. Intersect
  3. Except
  4. All of the above
MCQ: 232

Since duplicate retention is the default, we shall not use

  1. Distinct
  2. All
  3. Describe
  4. Whole
MCQ: 233

The command to delete the relation is

  1. Delete from *example*
  2. Delete about *example*
  3. Abort from *example*
  4. Abort about *example*
MCQ: 234

A special character, can be used to delimit the different attributes of a record, such as

  1. Question mark
  2. new-line character
  3. curly braces
  4. Comma
MCQ: 235

Indices whose search key formation is different from the sequential order of the file, are known to be

  1. Non-clustering indices
  2. Secondary indices
  3. Primary indices
  4. Both A and B

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