解决上SUM和AVG，不能对包含聚合或子查询的表达式执行聚合功能

Question

我在SQL下面的查询和与平均值：

USE DBSTG_INT
GO

select distinct 
sum(a.EventoPrecioReg) as PrecioRegular,
sum(a.EventoPrecioVta) as PrecioVenta,
AVG(VTA_IUnidades) as Unidades,
SUM((a.EventoPrecioVta - a.EventoPrecioReg) * (AVG(VTA_IUnidades))) as Inversion
from EventoPrecioDeta a WITH (NOLOCK)

当我执行它，它显示了以下问题：

消息130，15级，状态1，8号线 不能对包含聚合或子查询的表达式执行聚合功能。

我做了什么错，我该如何解决呢？

Answer 1

select distinct不会在这种情况下才有意义。你的问题是嵌套的聚集。也许你打算：

select sum(a.EventoPrecioReg) as PrecioRegular,
       sum(a.EventoPrecioVta) as PrecioVenta,
       AVG(VTA_IUnidades) as Unidades,
       SUM(a.EventoPrecioVta - a.EventoPrecioReg) * AVG(VTA_IUnidades) as Inversion
from EventoPrecioDeta a ;

Answer 2

尝试像下面不需要不同

select  
sum(a.EventoPrecioReg) as PrecioRegular,
sum(a.EventoPrecioVta) as PrecioVenta,
AVG(VTA_IUnidades) as Unidades,
SUM(a.EventoPrecioVta - a.EventoPrecioReg) * AVG(VTA_IUnidades) as Inversion
from EventoPrecioDeta a