Integrity Constraints Learning App | Database Systems MCQs e-Book PDF
Database Systems MCQs (Computer Science) From Textbook

Database Systems MCQs – Certification Test 1922

Integrity Constraints MCQs (Question 1922) – App & e-Book Download

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MCQ 1922: Attributes of foreign keys are allowed to be null, provided that they have not been declared to be:

  1. Not null
  2. Like Null
  3. As Null
  4. Candidate key

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