Question

6. Primary key allows the Null Values.
1 False
2 True
3) None of these​

Answer 1

Answer:

Explanation:

true

Answer 2

Explanation:

Since null is not equal to any value, it cannot be used as a primary key. Primary Key is used to identify rows uniquely in a table which cannot be null while Unique key may contain null value as per SQL rules.

TRUE

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