This example creates a database calledMusic. This is the most basic way to create a database using T-SQL. You can also do things like specify where to put the database data files and transaction log files, how much disk space they should use up, how much they're allowed to grow, an...
事务是SQL Server中的基本工作单元,它是用户定义的一个数据库操作序列,这些操作要么做要么全不做,是一个不可分割的工作单位。SQL Server中事务主要可以分为:自动提交事务、隐式事务、显式事务和分布式事务4种类型。 事务的含义# 事务要有非常明确的开始点和结束点,SQL Server中的每一条数据操作语句,例如 SELECT、...
T-SQL (Transact-SQL) is a set of programming extensions from Sybase and Microsoft that add several features to the Structured Query Language (SQL), including transaction control, exception and error handling, row processing and declared variables. All applications that communicate withSQL Serverdo so...
TCL (Transaction Control Language) DDL (Data Definition Language) DDL statements let you create, alter, and drop objects in your databases. StatementDescriptionExample CREATE Creates new objects: databases, tables, views, indexes, triggers, functions, procedures, etc. ...
SQL Server 以下列事务模式运行:自动提交事务 每条单独的语句都是一个事务。显式事务 每个事务均以 BEGIN TRANSACTION 语句显式开始,以 COMMIT 或 ROLLBACK 语句显式结束。隐式事务 在前一个事务完成时新事务隐式启动,但每个事务仍以 COMMIT 或 ROLLBACK 语句显式完成。批处理级事务 只能应用于多个活动结果集 (...
BEGIN TRANSACTION SELECT COUNT(*) FROM HumanResources.Employee WITH (TABLOCK, HOLDLOCK); C. 使用 SQL-92 CROSS JOIN 語法下列範例會傳回兩個數據表 Employee 和Department AdventureWorks2022 資料庫中的交叉乘積。 傳回一份清單,其中包含 BusinessEntityID 資料列與所有 Department 名稱資料列的所有可能組合。SQL...
This article discusses the Transact-SQL (T-SQL) differences between an Azure SQL Managed Instance and SQL Server.
适用于:SQL Server 此示例演示了使用基于证书的身份验证创建数据库镜像会话所需的所有阶段。 本主题中的示例使用 Transact-SQL。 建议您对数据库镜像连接进行加密,除非您能够保证网络的安全。 将证书复制到其他系统时,请使用安全的复制方法。 必须格外小心地保证所有证书的安全。
TransactionStatement TriggerAction TriggerActionType TriggerEnforcement TriggerObject TriggerOption TriggerOptionKind TriggerScope TriggerStatementBody TriggerType TruncateTableStatement TruncateTargetTableSwitchOption TryCastCall TryCatchStatement TryConvertCall TryParseCall TSEqualCall TSql100Parser TSql110Parser TS...
SqlConnection myADONETConnection = new SqlConnection(); SqlCommand myADONETCommand = new SqlCommand(); //Connect to the existing connection myADONETConnection = (SqlConnection)(Dts.Connections["Test ADO.NET Connection"].AcquireConnection(Dts.Transaction) as SqlConnection); ...