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Синтаксис SQL

SELECT AVG(column_name) FROM table_name

Пример SQL

O_IdOrderDateOrderPriceCustomer
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

1
SELECT AVG(OrderPrice) AS OrderAverage FROM Orders

Query Result:

950

1
2
SELECT Customer FROM Orders
WHERE OrderPrice>(SELECT AVG(OrderPrice) FROM Orders)

Query Result:

Customer
Hansen
Nilsen
Jensen

Comments

 
+8 #1 Шелест Константин 2010-10-28 23:07 ATP huge))) Quote
 
 
-2 #2 Раиль 2012-02-08 12:17 Quote
 
 
+1 #3 Степан 2012-02-22 05:29 Quote
 

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