Question

我使用多个表中的信息来尝试获取输出，供应商ID，供应商名称，带跟踪号的订单百分比。

我需要来自许多表的信息，如下所示：

供应商，包含供应商ID和供应商名称
SupplierSubscriptions，供应商必须具有subscriptionid = 91，其中包含供应商ID。
SalesOrders，它包含每个供应商的每个订单，因此它包含供应商ID。
货件，包含销售订单ID，每个货件与该订单相关联。
包裹，包含shipmentid，如果货件在包裹表上，则包含追踪编号。

到目前为止我所拥有的是：

SELECT DISTINCT so.supplierID, count(*) AS NumberOfOrders FROM SalesOrders so 
INNER JOIN suppliers s ON s.SupplierID = so.SupplierID
INNER JOIN SupplierSubscriptions ss ON s.SupplierID = ss.SupplierID
INNER JOIN shipments ship ON ship.SalesOrderID = so.SalesOrderID
INNER JOIN Packages p ON p.ShipmentID = ship.ShipmentID
WHERE ss.SubscriptionID = 91 GROUP BY so.SupplierID

显然，这不是我所追求的，因为它只显示供应商ID和订单数量......

Answer 1

我猜测架构的某些部分，但是这样的事情对你有用：

SELECT      so.supplierID,
            so.supplierName,
            SUM(case when p.trackingNumber is not null then 1 else 0 end) / COUNT(0) as OrdersWithTracking
FROM        SalesOrders             so 
INNER JOIN  suppliers               s       ON s.SupplierID = so.SupplierID
INNER JOIN  SupplierSubscriptions   ss      ON s.SupplierID = ss.SupplierID
INNER JOIN  shipments               ship    ON ship.SalesOrderID = so.SalesOrderID
INNER JOIN  Packages                p       ON p.ShipmentID = ship.ShipmentID
WHERE       ss.SubscriptionID = 91
GROUP BY    so.SupplierID, so.supplierName

复杂的SQL查询以从多个表中获取输出

1 个答案: