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SELECT m.OrderID ,left(m.productIDs,len(m.productIDs)-1) as productIDsFinal from
(SELECT OrderID,(SELECT cast(ProductID AS NVARCHAR ) + ',' from [Order Details]
where OrderID = ord.OrderID
FOR XML PATH('')) as productIDs
from orders ord
GROUP BY orderid) M --這個M一定要加,不知道為啥
ORDER by M.OrderID
http://www.dotblogs.com.tw/kevinya/archive/2012/06/01/72553.aspx
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