计算每个城市某一类别的支付百分比

如何解决计算每个城市某一类别的支付百分比

我有这个数据库

我们需要计算每个城市每个类别的支付百分比 我正在尝试这样做

    select SUM(ShipQty),SUM(ShipQty)*100/(select SUM(ShipQty) from InvoiceLineitemes 
inner join Invoice on InvoiceLineitemes.InvoiceNumber=Invoice.InvoiceNumber 
inner join Customers on Invoice.soldToCustomer=Customers.CustomerNumber group by City),Category,city from InvoiceLineitemes
inner join Inventory on InvoiceLineitemes.ItemNumber=Inventory.ItemNumber 
inner join Invoice on InvoiceLineitemes.InvoiceNumber=Invoice.InvoiceNumber 
inner join Customers on Invoice.soldToCustomer=Customers.CustomerNumber 
group by Category,City

但我面临这个错误

msg 512，级别 16，状态 1，第 1 行 子查询返回了 1 个以上的值。当子查询跟随 =、!=、、>= 或当子查询用作表达式时，这是不允许的。

解决方法

想必，您想要一个部分与整体的比率。最好使用窗口函数来解决这个问题：

select Category,city,sum(ShipQty),sum(ShipQty) * 100.0 / sum(sum(shipqty)) over (partition by city)
from InvoiceLineitemes ili join
     Inventory i
     on ili.ItemNumber = i.ItemNumber join
     Invoice inv
     on ili.InvoiceNumber = inv.InvoiceNumber join
     Customers c
     on inv.SoldToCustomer = c.CustomerNumber 
group by Category,City;

请注意，表别名还使查询更易于编写和阅读。