Friday, 15 January 2016

SQL AVG() Function

The AVG() Function

The AVG() function returns the average value of a numeric column.

SQL AVG() Syntax

SELECT AVG(column_name) FROM table_name

Demo Database

In this tutorial we will use the well-known Northwind sample database.
Below is a selection from the "Products" table:
ProductIDProductNameSupplierIDCategoryIDUnitPrice
1Chais1110 boxes x 20 bags18
2Chang1124 - 12 oz bottles19
3Aniseed Syrup1212 - 550 ml bottles10
4Chef Anton's Cajun Seasoning2248 - 6 oz jars21.35
5Chef Anton's Gumbo Mix2236 boxes25

SQL AVG() Example

The following SQL statement gets the average value of the "Price" column from the "Products" table:

Example:-

SELECT AVG(Price) AS PriceAverage FROM Products;

The following SQL statement selects the "ProductName" and "Price" records that have an above average price:

Example:-

SELECT ProductName, Price FROM Products
WHERE Price>(SELECT AVG(Price) FROM Products);


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