Beginner
SQL
Q34 / 100
What is the purpose of the UNIQUE constraint?
Correct! Well done.
Incorrect.
The correct answer is A) Ensures all values in a column are different from each other
A
Correct Answer
Ensures all values in a column are different from each other
Explanation
UNIQUE ensures that all values in a column (or combination of columns) are distinct across the table, though unlike PRIMARY KEY, multiple NULLs may be allowed depending on the database.
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