Select from following answers:- It is an analytic function which returns the first value from the order set of values. If the first value is null, then the function returns null.
- It is an ranking function which returns the first value from the order set of values. If the first value is null, then the function returns null.
- It is an ranking function which returns the first value from the unorder set of values. If the first value is null, then the function returns null.
- It is an analytic function which returns the first value from the unorder set of values. If the first value is null, then the function returns null.
- All Above
First_Value is an analytic function introduced in SQL SERVER 2012(DENALI).It returns the first value from the order set of values.If the first value in the set is null, then the function returns null until we specify IGNORE NULLS.However, if we specify IGNORE NULLS,then First_Value function returns the first non-nullable value else it returns all null values.The First_Value function returns the first value from the order set of values. If the first value is null, then the function returns null.
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