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Database Systems Competitive Exam MCQs – Practice Test 37 (Chapter 15)

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Download the "Introduction to SQL MCQs" App: Create table department (dept name varchar (20), building varchar (15), budget numeric (12,2), primary key (dept name)) the commands shows; MCQ with answers: executing the relation, retrieval of relation, creating a relation, and inserting in a relation. Solve Basic Structure of SQL Queries Quiz Questions, download Google e-Book (Free Chapter) to advance online learning.

Introduction to SQL MCQs – Practice Test 37 PDF Download

MCQ 181: We can write 'relation A contains relation B' as:

  1. exists (B except A)
  2. exists (A except B)
  3. notexists (A except B)
  4. notexists (B except A)

MCQ 182: Create table department (dept name varchar (20), building varchar (15), budget numeric (12,2), primary key (dept name)); the commands shows:

  1. Retrieval of relation
  2. Executing the relation
  3. Creating a relation
  4. Inserting in a relation

MCQ 183: The result of Boolean expression 'false or unknown' is:

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

MCQ 184: SQL includes a Boolean function for testing whether a subquery has:

  1. Unique tuples
  2. Duplicate tuples
  3. Tuples
  4. Empty tuples

MCQ 185: The command for deleting the instructor relation having salary range $13,000 and $15,000:

  1. delete about instructor
    where salary between 13000 and 15000;
  2. delete from instructor
    where salary between 13000 and 15000;
  3. delete from instructor
    where salary Like 13000 and 15000;
  4. delete about instructor where salary Like 13000 and 15000;

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