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SQL AVG() Function

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The SQL AVG() Function

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

Example

Find the average price of all products:

SELECT AVG(Price)
FROM Products;
Try it Yourself »

Note: NULL values are ignored.

Syntax

SELECT AVG(column_name)
FROM table_name
WHERE condition;

Demo Database

Below is a selection from the Products table used in the examples:

ProductID ProductName SupplierID CategoryID Unit Price
1 Chais 1 1 10 boxes x 20 bags 18
2 Chang 1 1 24 - 12 oz bottles 19
3 Aniseed Syrup 1 2 12 - 550 ml bottles 10
4 Chef Anton's Cajun Seasoning 2 2 48 - 6 oz jars 22
5 Chef Anton's Gumbo Mix 2 2 36 boxes 21.35

Add a Where Clause

You can add a WHERE clause to specify conditions:

Example

Return the average price of products in category 1:

SELECT AVG(Price)
FROM Products
WHERE CategoryID = 1;
Try it Yourself »

Use an Alias

Give the AVG column a name by using the AS keyword.

Example

Name the column "average price":

SELECT AVG(Price) AS [average price]
FROM Products;
Try it Yourself »

Higher Than Average

To list all records with a higher price than average, we can use the AVG() function in a sub query:

Example

Return all products with a higher price than the average price:

SELECT * FROM Products
WHERE price > (SELECT AVG(price) FROM Products);
Try it Yourself »

Test Yourself With Exercises

Exercise:

Use an SQL function to calculate the average price of all products.

SELECT 
FROM Products;

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