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CBSE Class 12 Computer Science Question 28 of 44

Solved 2025 Sample Question Paper CBSE Class 12 Computer Science (083) — Question 7

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Question 27-I(b)

What constraint should be applied on a table column so that NULL is not allowed in that column, but duplicate values are allowed.

Answer

To ensure that NULL values are not allowed in a table column while allowing duplicate values, we should use the NOT NULL constraint. The NOT NULL constraint ensures that every entry in the specified column must have a value (i.e., it cannot be NULL), but it allows duplicate values.