In an employee table to include the attributes whose value always have some value which of the following constraint must be used?(a) Null(b) Not null(c) Unique(d) DistinctI got this question during a job interview.My query is from Null Values Operations topic in division SQL : Queries, Constraints and Triggers of Database Management

In an employee table to include the attributes whose value always have

1.	In an employee table to include the attributes whose value always have some value which of the following constraint must be used?(a) Null(b) Not null(c) Unique(d) DistinctI got this question during a job interview.My query is from Null Values Operations topic in division SQL : Queries, Constraints and Triggers of Database Management
Answer» Correct option is (b) Not null To EXPLAIN: Not null CONSTRAINT removes the tuples of null VALUES.

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