触发器(Trigger) 触发器是一种特殊的存储过程,它不是由程序调用,而是通过事件(如INSERT、UPDATE、DELETE操作)自动触发执行。触发器主要用于数据验证、审计、日志记录和自动更新等场景,确保数据的一致性和完整性。 存储过程(Stored Procedure) 存储过程是一组为了完成特定功能的SQL语句和控制结构
SQL Server Stored Procedure and Trigger 概述 存储过程(Stored Procedure) 是一组完成特定功能的Transact- SQL语句的集合,即将一些固定的操作集中起来由SQL Server服务器来完成,应用程序只需调用它就可以实现某个特定的任务。 存储过程是可以通过用户、其他存储过程或触发器来调用执行。SQL Serve 2016的存储过程分为...
A SQL trigger is specialstored procedurethat is run when specific actions occur within a database. Most database triggers are defined to run when changes are made to a table’s data. Triggers can be defined to runinstead oforafterDML (Data Manipulation Language) actions such as INSERT, UPD...
第12题,什么是trigger? Trigger相当于stored procedure, 它是用来对某些动作出反应的机制。 create trigger name before|after event on tablename for each row | statememt execute procedure functionname arguments第13题,什么是view? view是个虚拟表,它包含多行多列,这些数据来自于一个或者多个表格。
Abstract:The article explains the principle of trigger and shows how to guarantee the data integrity in SQL SERVER .In addition, a settlement plan on inserting single-or multi-line data is also proposed. Keyword:data integrity; trigger;stored procedure ...
In SQL Server, SQL triggers are database objects, a special kind of stored procedures, which “reacts” to certain actions we make in the database.
Triggers are a specialized type of stored procedure that can be written to act on a table action such as an INSERT, UPDATE, or DELETE. If overused, they can potentially lead to performance issues such as blocking and, if they’re not written correctly, you could be losing data. ...
SQL triggers are a special type of stored procedure that are executed when a data change takes place on a table. When they are declared, triggers are associated with a specific table and with a SQL data modification operation such as INSERT, UPDATE, or DELETE. Triggers can be implemented ...
A SQL Server trigger is a piece of procedural code. It is just like a stored procedure which is only executed when a given event happens. There are different types of events that can fire a trigger. To name you a few, the insertion of rows in a table, a change in a table structure...
Create Trigger to delete old data first before Inserts. create view as EXEC sp Create view dynamic pivot create view from stored procedure Create view with NOLOCK CREATE VIEW WITH PRIMARY KEY CREATE/ALTER PROCEDURE' must be the first statement in a query batch. Create/Alter view with declare ...