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Which aggregate function returns a count of all non-null values returned by a value expression? count(Value) count(*) MAX (Value Expression) SUM(Value Expression)

Respuesta :

The aggregate function that returns a count of all non-null values returned by a value expression is A. count(Value)

Which of the following is an aggregate function?

An aggregate function, also known as an aggregation function, is a database management function that groups the values of multiple rows together to form a single summary value.

An aggregate function computes on a set of values and returns a single value. Except for COUNT(*), aggregate functions do not take into account null values. Aggregate functions are frequently used in conjunction with the SELECT statement's GROUP BY clause.

The function count(expression) can be used to return the number of non- null values returned by the expression.

COUNT() returns the total number of rows in the result set. SELECT COUNT(*) FROM Customers; Run Code, for example. The SQL command in this case counts rows and returns the total number of rows in the Customers table.

In conclusion, based on the information illustrated, the correct option is A.

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