Home Database Mysql Tutorial 在SQL Server中使用OpenQuery访问其他数据库

在SQL Server中使用OpenQuery访问其他数据库

Jun 07, 2016 pm 03:12 PM
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OpenQuery 是SQL Server用来与 其他 Server交互的一种技术, 通过OpenQuery,SQL Server 可以直接 访问 其他 数据库 资源。 而 其他 数据库 在OpenQuery 表达式中是以Linked Server 存在的。 使用 sp_linkedservers 可以找到当前 数据库 的所有linked server

OpenQuery 是SQL Server用来与其他Server交互的一种技术,

通过OpenQuery,SQL Server 可以直接访问其他数据库资源。

其他数据库在OpenQuery 表达式中是以Linked Server 存在的。

使用sp_linkedservers 可以找到当前数据库的所有linked server.

也可以在sql server管理工具的“服务器对象”-“连接服务器”中查看当前数据库中的Linked Server:

 

 OpenQuery的表达式可以这么写:

Select * from OpenQuery([linkedServerName],'Select * from table1 where rownum < 10')
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而且值得注意的是,如果,你要在OpenQuery中执行如下的数据库语句,

Select * from tbl_emp Where empName = 'leo''
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leo' 必须以双引号的形式传入,如下,

Select * from OpenQuery([linkedServerName],'Select * from table1 where empName = ''leo''')
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如果要传入一个参数到OPENQUERY里面,

可以组装动态sql,并通过exec执行即可。

DECLARE @Sql VARCHAR(1000)DECLARE @organizationID VARCHAR(10)

SELECT @organizationID = (SELECT ORGANIZATION_ID FROM MYORGS WHERE ORGANIZATION_NAME = 'MMT')

SET @Sql = 'SELECT * from tableName where organization_id='+@organizationID

SET @Sql = 'SELECT * FROM OPENQUERY(BETSYCRP2, ''' + REPLACE(@Sql, '''', '''''') + ''')'

EXEC(@Sql) 
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