Question

需要INNER JOIN UPDATE OUTPUT返回的结果集与另一个表并返回结果。有可能吗？

这是一个小例子：

CREATE TABLE [dbo].[Customers]
(   
   [CustomerId] [int],   
   [CustomerName]  [nvarchar](50)
)
GO

CREATE TABLE [dbo].[Orders]
(   
   [OrderId] [int],   
   [OrderName]  [nvarchar](50)
)
GO

CREATE TABLE [dbo].[CustomerOrders]
(   
   [CustomerId] [int],   
   [OrderId]  [int]
)
GO

INSERT INTO CustomerOrders (CustomerId, OrderId) VALUES (1, 1)
INSERT INTO CustomerOrders (CustomerId, OrderId) VALUES (1, 2)
INSERT INTO CustomerOrders (CustomerId, OrderId) VALUES (2, 1)
GO

需要在CustomerOrders表上更新OrderId并返回客户名称，一次性全部。到目前为止，我只能返回CustomerIds：

UPDATE CustomerOrders SET OrderId=NULL 
OUTPUT Deleted.CustomerId
WHERE OrderId='1'

Answer 1

TSQL / SQL Server 2005+支持UPDATE子句中的JOIN - 请参阅documentation：

UPDATE CUSTOMERORDERS
   SET orderid = NULL
OUTPUT c.customername
  FROM CUSTOMERORDERS co
  JOIN CUSTOMERS c ON c.customerid = co.customerid

INAD JOIN在UPDATE OUTPUT中的一个t-sql查询中

1 个答案: