Typically, linked servers are used to handle distributed queries. When a client application executes a distributed query through a linked server, SQL Server parses the command and sends requests to OLE DB. The
有关详细信息,请参阅 sys.databases dm_exec_query_stats (Transact-SQL)。批处理的实际 Transact-SQL 文本存储在单独的内存空间中,该位置与计划缓存,即 SQL Manager 缓存 (SQLMGR) 的存储位置不同。 使用 SQL 句柄,可以从 SQL Manager 缓存检索已编译计划的 Transact-SQL 文本,这是一个暂时性标识符,仅当...
OPENROWSET ( provider_name , { datasource ; user_id ; password | provider_string } , { [ catalog.] [ schema.] object | query } ) 参数: provider_name:代表登录中指定的 OLE DB Provider 的亲和名称之字元字串。 provider_name 没有预设值。 datasource:是对应到特殊 OLE DB 资料来源的字串常数。
Azure SQL Managed Instance linked servers support both SQL authentication and authentication with Microsoft Entra ID (formerly Azure Active Directory). To use SQL Agent jobs on Azure SQL Managed Instance to query a remote server through a linked server, use sp_addlinkedsrvlogin to create a mapping ...
Microsoft SQL Server supports connections to other OLE DB data sources on a persistent or an ad hoc basis. The persistent connection is known as a linked server; an ad hoc connection that is made for the sake of a single query is known as a distributed query. ...
其中OPENDATASOURCE和OPENROWSET方法一般用来做临时查询(ad hoc query),如果需要经常的查询远程数据,则建议创建linked servers。但是,默认情况ad hoc query 是禁用的,需要手动启动: sp_configure ‘show advanced options’, 1; GO RECONFIGURE; GO sp_configure ‘Ad hoc Distributed Queries’, 1; ...
Affects Distributed Query execution against linked servers. If this option is set to true, SQL Server assumes that all characters in the linked server are compatible with the local server, with regard to character set and collation sequence (or sort order). This enables SQL Server to send compa...
-- 建立连接服务器 第一步建立连接 IP方式来控制EXECsp_addlinkedserver'192.168.10.104','SQL Server'-- 查看链接服务器信息 [测试连接成功]selectname, product, provider, data_source, query_timeout, lazy_schema_validation, is_remote_login_enabled, is_rpc_out_enabledfromsys.serverswhereis_linked= 1...
select name,product,provider,data_source,query_timeout,lazy_schema_validation,is_remote_login_enabled,is_rpc_out_enabled from sys.servers where is_linked=1 1. 2. 配置链接服务器属性 exec sp_serveroption ‘别名’,‘name’,‘远程服务器IP’ ...
To access data from an Excel spreadsheet, associate a range of cells with a name. The following query can be used to access the specified named range SalesData as a table by using the linked server set up previously. SELECT * FROM ExcelSource...SalesData GO ...