The AVG() Function The AVG() function returns the average value of a numeric column. SQL AVG() Syntax SELECT AVG(column_name) FROM table_n...
The AVG() Function
The AVG() function returns the average value of a numeric column.SQL AVG() Syntax
SELECT AVG(column_name) FROM table_name |
SQL AVG() Example
We have the following "Orders" table:| O_Id | OrderDate | OrderPrice | Customer |
|---|---|---|---|
| 1 | 2008/11/12 | 1000 | Hansen |
| 2 | 2008/10/23 | 1600 | Nilsen |
| 3 | 2008/09/02 | 700 | Hansen |
| 4 | 2008/09/03 | 300 | Hansen |
| 5 | 2008/08/30 | 2000 | Jensen |
| 6 | 2008/10/04 | 100 | Nilsen |
Now we want to find the average value of the "OrderPrice" fields.
We use the following SQL statement:
SELECT AVG(OrderPrice) AS OrderAverage FROM Orders |
The result-set will look like this:
| OrderAverage |
|---|
| 950 |
Now we want to find the customers that have an OrderPrice value higher then the average OrderPrice value.
We use the following SQL statement:
SELECT Customer FROM Orders WHERE OrderPrice>(SELECT AVG(OrderPrice) FROM Orders) |
The result-set will look like this:
| Customer |
|---|
| Hansen |
| Nilsen |
| Jensen |
