Admissions data shows duplicate applicant emails causing login confusion. What is the most direct database constraint fix to prevent duplicate entries?

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Computer Science · Database Management Systems

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Enforce a UNIQUE constraint on email

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Answer 1

Add a FOREIGN KEY constraint on email

Answer 2

Enforce a UNIQUE constraint on email

Answer 3

Create a view that selects distinct emails

Answer 4

Lower the transaction isolation level

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