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Database Systems MCQs (Computer Science) From Textbook

Database Systems MCQs – Practice Test 24 (Chapter 21)

SQL Concepts and Queries Notes Questions and Answers PDF – Test 24

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Free SQL Concepts and Queries Notes App Download: If a view relation is computed and stored, it may become out of date if the; MCQ with answers: defined tuples are swapped, defined attributes are swapped, defined structure is changed, and defined relations are modified. Practice Query Optimization Techniques Quiz Questions, download Kobo e-Book (Free Chapter) for database distance education.

SQL Concepts and Queries Notes Q&A PDF Download – Practice Test 24

MCQ 116: The clause that can specify that if a delete or update action on the referenced relation violates the constraint, is the one:

  1. Select clause
  2. Create clause
  3. Primary key clause
  4. Foreign key clause

MCQ 117: If a view relation is computed and stored, it may become out of date if the:

  1. Defined attributes are swapped
  2. Defined tuples are swapped
  3. Defined structure is changed
  4. Defined relations are modified

MCQ 118: The form of the create view command is:

  1. define view v as ;
  2. create view v as
  3. create view v as ;
  4. define view v like ;

MCQ 119: Once we have defined a view, we can use the view name to refer to the:

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

MCQ 120: When a user submits an SQL query, from using an index, the SQL query processor uses the:

  1. Relation
  2. Query
  3. Index
  4. locator

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