What is the use of aggregate function?

Question

An aggregate function performs a calculation on a set of values, and returns a single value. Except for COUNT(*) , aggregate functions ignore null values. Aggregate functions are often used with the GROUP BY clause of the SELECT statement. 30 нояб. 2021 г.

Why is aggregate function used?

An aggregate function allows you to perform a calculation on a set of values to return a single scalar value. We often use aggregate functions with the GROUP BY and HAVING clauses of the SELECT statement.

What is the use of aggregate functions in Oracle?

Oracle applies the aggregate functions to each group of rows and returns a single result row for each group. If you omit the GROUP BY clause, then Oracle applies aggregate functions in the select list to all the rows in the queried table or view.

Expert · Answer

An aggregate function allows you to perform a calculation on a set of values to return a single scalar value. We often use aggregate functions with the GROUP BY and HAVING clauses of the SELECT statement.

Expert · Answer

Oracle applies the aggregate functions to each group of rows and returns a single result row for each group. If you omit the GROUP BY clause, then Oracle applies aggregate functions in the select list to all the rows in the queried table or view.

What is the use of aggregate function?

Why is aggregate function used?

What is the use of aggregate functions in Oracle?

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