SELECT OrderNumber, FIRST(ShippingName) as ShippingName FROM Orders
GROUP BY OrderNumber
这给了错误, 我该怎么做呢?
SQL 服务器不支持 FIRST 函数 。
也许你想
SELECT OrderNumber, MIN(ShippingName) as ShippingName
FROM Orders
GROUP BY OrderNumber
但是,也许不是。相反,我猜你的意思是...对于每个 Ordernumber ,对于所有行中所有有 Ordernumber 的行,根据某些顺序选择第一行的 ShippingName 。
SELECT OrderNumber,
(
SELECT TOP 1 ShippingName
FROM Orders AS OrdersInner
WHERE OrdersInner.OrderNumber = Orders.OrderNumber
ORDER BY OrdersInner.OrderDate, OrdersInner.OrderId
) as ShippingName
FROM Orders
GROUP BY OrderNumber
但我对你的需求和数据库结构 都做了一些假设
或许你的意思是:
SELECT TOP 1 OrderNumber, ShippingName
FROM Orders
ORDER BY OrderNumber DESC
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