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Summary: in this tutorial, you will learn about the SQL aggregate functions including AVG(), COUNT(), MIN(), MAX(), and SUM(). An SQL aggregate function calculates on a set of values and returns a single value. For example, the average function ( AVG) takes a list of values and returns the average.
The SQL AVG function is an aggregate function that calculates the average value of a set. The following illustrates the syntax of the SQL AVG function: AVG([ALL|DISTINCT] expression) Code language: SQL (Structured Query Language) ( sql )
The SQL COUNT function is an aggregate function that returns the number of rows returned by a query. You can use the COUNT function in the SELECT statement to get the number of employees, the number of employees in each department, the number of employees who hold a specific job, etc.
SQL provides the MAX function that allows you to find the maximum value in a set of values. The following illustrates the syntax of the MAX function. MAX(expression) Code language: SQL (Structured Query Language) ( sql )
The SQL MIN function returns the minimum value in a set of values. The following demonstrates the syntax of the MIN function. MIN(expression) Code language: SQL (Structured Query Language) ( sql )
The SQL SUM function is an aggregate function that returns the sum of all or distinct values. We can apply the SUM function to the numeric column only. The following illustrates the syntax of the SUM function.
Introduction to SQL Window Functions. The aggregate functions perform calculations across a set of rows and return a single output row. The following query uses the SUM() aggregate function to calculate the total salary of all employees in the company: SELECT SUM (salary) sum_salary FROM employees; Code language: SQL (Structured Query Language ...
This tutorial introduces you SQL GROUP BY that combines rows into groups and apply aggregate function such as AVG, SUM, COUNT, MIN, MAX to each group.
In this tutorial, you will learn about the SQL aggregate functions including AVG(), COUNT(), MIN(), MAX(), and SUM().
Aggregate functions – introduce you to the most commonly used aggregate functions in SQL including AVG, COUNT, SUM, MAX, and MIN. AVG – calculate the average value of a set. COUNT – return the number of items in a set.
