在 OPENQUERY 中包含参数 [英] including parameters in OPENQUERY

问题描述

如何在sql openquery里面使用一个参数，比如:

How can I use a parameter inside sql openquery, such as:

SELECT * FROM OPENQUERY([NameOfLinkedSERVER], 'SELECT * FROM TABLENAME
where field1=@someParameter') T1 INNER JOIN MYSQLSERVER.DATABASE.DBO.TABLENAME
T2 ON T1.PK = T2.PK

推荐答案

来自 OPENQUERY 文档说明:

OPENQUERY 不接受变量因为它的论点.

OPENQUERY does not accept variables for its arguments.

有关解决方法，请参阅此文章.

See this article for a workaround.

更新:

按照建议，我将包含以下文章中的建议.

As suggested, I'm including the recommendations from the article below.

传递基本值

当基本的 Transact-SQL 语句已知，但您必须传入一个或多个特定值时，请使用类似于以下示例的代码:

When the basic Transact-SQL statement is known, but you have to pass in one or more specific values, use code that is similar to the following sample:

DECLARE @TSQL varchar(8000), @VAR char(2)
SELECT  @VAR = 'CA'
SELECT  @TSQL = 'SELECT * FROM OPENQUERY(MyLinkedServer,''SELECT * FROM pubs.dbo.authors WHERE state = ''''' + @VAR + ''''''')'
EXEC (@TSQL)

传递整个查询

当您必须传入整个 Transact-SQL 查询或链接服务器的名称(或两者)时，请使用类似于以下示例的代码:

When you have to pass in the whole Transact-SQL query or the name of the linked server (or both), use code that is similar to the following sample:

DECLARE @OPENQUERY nvarchar(4000), @TSQL nvarchar(4000), @LinkedServer nvarchar(4000)
SET @LinkedServer = 'MyLinkedServer'
SET @OPENQUERY = 'SELECT * FROM OPENQUERY('+ @LinkedServer + ','''
SET @TSQL = 'SELECT au_lname, au_id FROM pubs..authors'')' 
EXEC (@OPENQUERY+@TSQL) 

使用 Sp_executesql 存储过程

为避免多层引号，请使用类似于以下示例的代码:

To avoid the multi-layered quotes, use code that is similar to the following sample:

DECLARE @VAR char(2)
SELECT  @VAR = 'CA'
EXEC MyLinkedServer.master.dbo.sp_executesql
N'SELECT * FROM pubs.dbo.authors WHERE state = @state',
N'@state char(2)',
@VAR

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