开始使用 SQL Server Management Studio (SSMS) 连接到 SQL Server 实例并运行一些 Transact-SQL (T-SQL) 命令。 备注 虽然Microsoft Entra ID 是Azure Active Directory (Azure AD)的新名称,但为了防止中断现有环境,Azure AD 仍保留在一些硬编码的元素中,例如 UI 字段、连接提供程序、错误代码和 cmdlet。 在本文...
SQL Server 概述 语法 显示另外 10 个 创建新数据库。 选择以下选项卡之一,了解所使用的特定 SQL 版本的语法、参数、备注、权限和示例。 选择一个产品 在下面的行中,选择你感兴趣的产品名称,系统将只显示该产品的信息。 SQL Server 概述 在SQL Server 中,此语句创建新数据库和使用的文件及其文件组。 它还可用...
若要找出已属于某个可用性组的本地数据库,请参阅 sys.databases 目录视图中的 replica_id 列。 仅在主要副本上受支持。 备注 创建可用性组后,需要连接到承载辅助副本的每个服务器实例,然后准备每个辅助数据库并将其加入可用性组。 有关详细信息,请参阅启动Always On 辅助数据库的数据移动 (SQL Server)。
For more information, see DROP DATABASE. Each snapshot persists until it is deleted by using DROP DATABASE. For more information, see Database Snapshots and Create a database snapshot (Transact-SQL). Database options Several database options are automatically set whenever you create a database...
ADO.NET 2.0 已与 SQL Server 2005 集成在一起,其中加入了支持数据库镜像的功能并且提供了应用程序到镜像环境的透明故障转移。这就使得 ADO.NET 应用程序在无法与主体数据库建立连接时,无需另外进行任何编码或配置即可自动进行故障转移。其配置就像在两个环境之间指定公共用户以及在连接字符串中指定故障转移伙伴一样容...
SQL2076WThe DB2 Data Links Managerserver-namewas not registered to the database. Explanation The DB2 Data Links Managerserver-namewas not registered to the database with the ADD DATALINKS MANAGER command. User response For details on why the ADD DATALINKS MANAGER command failed, check the adminis...
The SQL Server Database Engine uses the following mechanisms to ensure the integrity of transactions and maintain the consistency of databases when multiple users are accessing data at the same time: Locking Each transaction requests locks of different types on the resources, such as rows, pages, ...
DQL: Data Query Language is used to retrieve data from databases using the SELECT statement. 9. Difference between Drop, Delete, and Truncate commands? The DROP, DELETE, and TRUNCATE commands in SQL are used for removing data, but they differ significantly: DROP: Drop command is a DDL comman...
DQL: Data Query Language is used to retrieve data from databases using the SELECT statement. 9. Difference between Drop, Delete, and Truncate commands? The DROP, DELETE, and TRUNCATE commands in SQL are used for removing data, but they differ significantly: DROP: Drop command is a DDL comman...
Issue the UPGRADE DATABASE command before attempting to access the database. If you receive this message when you issued a database restore, drop the existing database before proceeding. sqlcode: -5035 sqlstate: 55001 SQL5040NOne of the socket addresses required by the TCP/IP server support is...