[INSERT][DELETE][UPDATE]AS-- SQL语句 修改触发器-使用SSMS 重命名触发器-使用T-SQL EXECUTEsp_rename 触发器旧名 触发器新名; 禁用触发器-使用T-SQL DISABLETRIGGER触发器名|ALLON表名; 或 ALTERTABLE表名 DISABLETRIGGER触发器名; 禁用触发器-使用SSMS 启用触发器-使用T-SQL ENABLETRIGGER触发器名|ALLON表...
触发器英文名为trigger,也就是板机的意思,与枪支的操作原理类似,只有扣动板机,子弹才会飞出。将该词用在SQL SERVER环境中,表示当表发生了insert 、update、delete操作之后,才会执行的t-SQL程序,这样的程序就叫触发器。 应用场景: 触发器可以查询其他表,而且可以包含复杂的SQL语句。它们主要用于强制复杂的业务规则或要...
先看示例代码: 1createtriggertri_order_NowOrderPrice2onorders afterinsert3as4begin5declare@NowOrderPricemoney;6declare@BuyNumberint;7declare@ProductIDint;8select@ProductID=ProductID,@BuyNumber=BuyNumberfrominserted;9select@NowOrderPrice=inserted.BuyNumber*inserted.BuyPricrfrominserted;10updateorderssetNowO...
要使用T-SQL编写一个触发器来跟踪表的数据更改,你可以创建一个AFTER UPDATE触发器。以下是一个示例: CREATE TRIGGER trg_TrackDataChanges ON YourTableName AFTER UPDATE AS BEGIN -- 声明变量以存储旧和新数据 DECLARE @OldData VARCHAR(MAX), @NewData VARCHAR(MAX); -- 获取被更新的行的数据 SELECT @OldD...
SQL Server 创建触发器(trigger) 2017-04-21 02:04 −触发器简介: 触发器是一种特殊的存储过程,它的执行不是由程序调用,也不是手动执行,而是由事件来触发。触发器是当对某一个表进行操作。例如:update、insert、delete这些操作的时候,系统会自动调用执行该表上对应的触发器。 触发器分类: 1、DML( 数据操纵...
在SQL Server 2008中,设要在T表上创建一个针对插入和更新操作的后触发型触发器。请补全下列语句: CREATE TRIGGER tri_T ON T1 1INSERT, UPDATE AS… (分数:2.00)相关知识点: 试题来源: 解析 解析:AFTER或FOR[解析] 使用AFTER或FOR选项定义的触发器为后触发的触发器,使用INSTEAD OF选项定义的触发器为前触发...
TriggerStatementBody TriggerType TruncateTableStatement TruncateTargetTableSwitchOption TryCastCall TryCatchStatement TryConvertCall TryParseCall TSEqualCall TSql100Parser TSql110Parser TSql120Parser TSql130Parser TSql140Parser TSql150Parser TSql150Parser 构造函数 字段 方法 TSql80Parser TSql90Par...
SQL Server Yukon Beta 1 introduces support for Data Definition Language (DDL) triggers, allowing you to trap DDL operations and react to them, optionally rolling back the activity. DDL triggers work synchronously, right after the triggering event, similar to the way triggers from previous version...
SQL Server Agent Enabling and disabling SQL Server Agent is currently not supported in SQL Managed Instance. SQL Agent is always running. Job schedule trigger based on an idle CPU isn't supported. SQL Server Agent settings are read only. The proceduresp_set_agent_propertiesisn't supported in...
The types of natively compiled modules available through Transact-SQL are: Natively compiled stored procedures (native procs). Natively compiledscalar user-defined functions. Natively compiled triggers (native triggers). Only triggers that are natively compiled are allowed on memory-optimized tables. ...