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Question

What is the function of the not null constraint?

a.

It prevents illegal data from being entered into the database

b.

It ensures that data is entered into the database

c.

It ensures that the data entered is unique

d.

None of the mentioned

Posted under Advanced SQL DBMS

Answer: (b).It ensures that data is entered into the database

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Q. What is the function of the not null constraint?

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