Question

我正在使用两个表，一个称为客户，一个称为订单。客户表中有三个customerType值，“现金”，“企业”和“个人”。我需要找到每周每种customerType的销售百分比。

这是我到目前为止遇到的麻烦：

select Customer.customerType as 'Customer Type',
    format(dateadd(day, -datediff(day, 0, [dbo].[Order].orderDate) % 7, [dbo].[Order].orderDate), 'dd-MM-yy') as 'Week of',
    (case 
        when Customer.customerType = 'Cash' then (select sum([dbo].[Order].totalValue) from [dbo].[Order], Customer
            where [dbo].[Order].customerId = Customer.id
            and Customer.customerType = 'Cash')
        when Customer.customerType = 'Corporate' then (select sum([dbo].[Order].totalValue) from [dbo].[Order], Customer
            where [dbo].[Order].customerId = Customer.id
            and Customer.customerType = 'Corporate')
        else (select sum([dbo].[Order].totalValue) from [dbo].[Order], Customer
            where [dbo].[Order].customerId = Customer.id
            and Customer.customerType = 'Personal')
    end) / sum([dbo].[Order].totalValue) as 'Percentage of Sales for the Week'
from [dbo].[Order], Customer
where Customer.id = [dbo].[Order].customerId
group by format(dateadd(day, -datediff(day, 0, [dbo].[Order].orderDate) % 7, [dbo].[Order].orderDate), 'dd-MM-yy'), Customer.customerType
order by format(dateadd(day, -datediff(day, 0, [dbo].[Order].orderDate) % 7, [dbo].[Order].orderDate), 'dd-MM-yy')

这真是一团糟，我很失落。请帮忙!!!

Answer 1

根据您发布的查询，我将其简化为以下内容

注意：

（1）避免使用旧式连接table1, table2，而应使用INNER JOIN。（2）使用表别名

SELECT  c.customerType as [Customer Type],
        format(dateadd(day, -datediff(day, 0, o.orderDate) % 7, o.orderDate), 'dd-MM-yy') as [Week of],
        SUM (o.totalValue) 
      / SUM (SUM (o.totalValue) ) OVER (PARTITION BY format(dateadd(day, -datediff(day, 0, o.orderDate) % 7, o.orderDate), 'dd-MM-yy'))
            as [Percentage of Sales for the Week]
FROM    Customer c
        INNER JOIN [dbo].[Order] o  on  c.id    = o.customerId
GROUP BY c.customerType,
         format(dateadd(day, -datediff(day, 0, o.orderDate) % 7, o.orderDate), 'dd-MM-yy')
ORDER BY [Week of], c.customerType

SQL Server中的每周百分比细分

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