SQL getting started Tutorial: SQL AVG () function

Source: Internet
Author: User

SQL getting started Tutorial: SQL AVG () function

Avg () function
Average value returned by the avg () function, value column.

Database AVG () syntax

SELECT AVG(column_name) FROM table_name
Let's first look at a table.
 
 
_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 are looking for the "OrderPrice" Field of average value.

The following SQL statement is used:

 

SELECT AVG(OrderPrice) AS OrderAverage FROM Orders
 
Output result.
  
  
OrderAverage
950
 
  
  
Customer
Hansen
Nilsen
Jensen

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