Question

必须在2002年和2002年的当月找到总销售额和获得的总折扣

表1：SalesOrderDetail

      - UnitPrice
      - UnitPriceDiscount
       - OrderQty

表2：SalesOrderHeader

      - OrderDate

附加是这两个表的模式的快照

https://i.stack.imgur.com/f2b5A.png

我可以设法单独得到结果，但不知道如何组合/聚合它们......是否使用转置或转轴......

#Yearly

select DATE_FORMAT(a.OrderDate,'%Y') AS Yearly,sum(b.UnitPriceDiscount) as DiscTotal,
 SUM((`UnitPrice` * OrderQty)-UnitPriceDiscount) AS total 

FROM SalesOrderHeader a join SalesOrderDetail b 

on b.SalesOrderID = a.SalesOrderID

WHERE YEAR(OrderDate) = 2002 

group by Yearly

order by MONTH(OrderDate)

#CurMonthOfYear

select DATE_FORMAT(a.OrderDate,'%M') AS CurrentMonth,sum(b.UnitPriceDiscount) as DiscountAmt,
 SUM((`UnitPrice` * OrderQty)-UnitPriceDiscount) AS total 

FROM SalesOrderHeader a join SalesOrderDetail b 

on b.SalesOrderID = a.SalesOrderID

 WHERE month(OrderDate) = MONTH( NOW())

**结果应采用以下格式**

  Metrics               Yearly               CurMonthOfYear

DiscountAmt         540.82                            28.48

TotalSales          303.17                     237.2

Answer 1

您的问题建议有条件的汇总。但是，这最简单的分为四列：

select sum(sod.UnitPriceDiscount) as DiscTotal_year,
       sum((UnitPrice * OrderQty) - UnitPriceDiscount) AS total_year,
       sum(case when month(sod.OrderDate) = month(now())
                then sod.UnitPriceDiscount else 0
           end) as DiscTotal_month,
       sum(case when month(sod.OrderDate) = month(now())
                then (UnitPrice * OrderQty) - UnitPriceDiscount else 0
           end) as Total_month
from SalesOrderHeader soh join
     SalesOrderDetail sod b
     on sod.SalesOrderID = soh.SalesOrderID
where year(soh.OrderDate) = 2002 ;

虽然您可以将其转换为单独的行，但这会使查询更复杂。

Answer 2

select a.Metrics , a.yearly , b.CurMonthOfyear FROM 
(
select 'DiscountAmt' as Metrics , sum(b.UnitPriceDiscount) as yearly
FROM SalesOrderHeader a join SalesOrderDetail b 
on b.SalesOrderID = a.SalesOrderID
WHERE YEAR(OrderDate) = 2002 

union all

select 'TotalSales' as Metrics , SUM((b.UnitPrice * b.OrderQty)-b.UnitPriceDiscount) AS yearly
FROM SalesOrderHeader a join SalesOrderDetail b 
on b.SalesOrderID = a.SalesOrderID
WHERE YEAR(OrderDate) = 2002 

)a

inner join 
(
select 'DiscountAmt' as Metrics , sum(b.UnitPriceDiscount) as CurMonthOfyear
FROM SalesOrderHeader a join SalesOrderDetail b 
on b.SalesOrderID = a.SalesOrderID WHERE month(OrderDate) = MONTH( NOW())

union all

select 'TotalSales' as Metrics , SUM((b.UnitPrice * b.OrderQty)-b.UnitPriceDiscount) AS CurMonthOfyear
FROM SalesOrderHeader a join SalesOrderDetail b 
on b.SalesOrderID = a.SalesOrderID
WHERE month(OrderDate) = MONTH( NOW())
)

b ON a.Metrics = b.Metrics

这不是数据透视或转置，但查询有助于以所需格式获取输出。

销售的Agggregate ...转轴或转置？

2 个答案: