Q11medium
What happens if you try to insert a duplicate value into a column that has a UNIQUE constraint, but is NOT the Primary Key?
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15 Questions Total
Relational Database Concepts MCQs
Topic-wise practice questions for Database Management Systems. Test your knowledge, check solutions on demand, and pace your preparation.
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Practice in Timed ModeQ12medium
A developer attempts to execute the following SQL script. Which relational constraint will likely cause the second INSERT to fail?
Q13easy
How does a Foreign Key differ from a Primary Key regarding NULL values?
Q14easy
What is the technical difference between a Super Key and a Candidate Key?
Q15hard
A database designer identifies three possible unique identifiers for a Vehicle table: VIN (Vehicle Identification Number), EngineNumber, and LicensePlate. In relational terminology, what are these three attributes called before one is officially selected as the Primary Key?