SQL Server AVG() Function

Return the average value for the "Price" column in the "Products" table:

SELECT AVG(Price) AS AveragePrice FROM Products;

Definition and Usage

The AVG() function returns the average value of an expression.

Note: NULL values are ignored.

AVG(expression)

Parameter	Description
expression	Required. A numeric value (can be a field or a formula)

Works in:	SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse

Select all the products that have a price above the average price:

SELECT * FROM Products
WHERE Price > (SELECT AVG(Price) FROM Products);