7
La cláusula SQL OVER (): ¿cuándo y por qué es útil?
USE AdventureWorks2008R2; GO SELECT SalesOrderID, ProductID, OrderQty ,SUM(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Total' ,AVG(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Avg' ,COUNT(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Count' ,MIN(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Min' ,MAX(OrderQty) OVER(PARTITION BY SalesOrderID) AS 'Max' FROM Sales.SalesOrderDetail WHERE SalesOrderID IN(43659,43664); Leí sobre esa cláusula y no entiendo por …