今天简单总结一下SQL中PROCEDUR,TRIGGER,FUNCTION的简单应用。 一.简单PROCEDURE 1.不带参数 create proc PROC_Test as select 字段名 from 表名 2.带输入,输出参数 create proc PROC_TESTParamer @ID varchar(16), @username varchar(20) output as select @username = USERNAME FROM 表名 where ID = @ID ...
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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 201
Mostra 6 in più Si applica a:SQL Server database SQL di Azure Istanza gestita di SQL di AzureCrea un trigger DML, DDL o LOGON. Un trigger è una stored procedure di tipo speciale che viene eseguita automaticamente quando si verifica un evento nel server di database. I trigger DML ve...
It can be easier to define a stored procedure separately and then invoke it from the trigger using a simpleCALLstatement. This is also advantageous if you want to execute the same code from within several triggers. There are limitations on what can appear in statements that a trigger executes...
For CLR triggers to work you have to enable the "clr enabled" server option using the sp_configure system stored procedure. Enabling CLR code to run in the database instance has a potential security threat because a malicious user can add CLR assemblies to a database and then take control...
Considerazioni sui trigger DML Mostra 6 in più Si applica a: SQL Server Database SQL di Azure Istanza gestita di SQL di AzureCrea un trigger DML, DDL o LOGON. Un trigger è una stored procedure di tipo speciale che viene eseguita automaticamente quando si verifica un evento nel ser...
DELETE | UPDATE [OF column [, column …]]}[OR {INSERT | DELETE | UPDATE [OF column [, column …]]}...]ON [schema.]table_name | [schema.]view_name[REFERENCING {OLD [AS] old | NEW [AS] new| PARENT as parent}][FOR EACH ROW ][WHEN condition]PL/SQL_BLOCK | CALL procedure_...
() returns trigger as $$ declare begin truncate table test_trigger_des_tb0010; return new; end $$ language plpgsql; / --创建触发器 create trigger truncate_trigger0010 before truncate on test_trigger_src_tb0010 for each statement execute procedure tri_truncate_func0010(); / --执行触发事件 ...
一、存储过程procedure MySQL 5.0 版本开始支持存储过程。 存储过程(Stored Procedure)是一种在数据库中存储复杂程序,以便外部程序调用的一种数据库对象。 存储过程是为了完成特定功能的SQL语句集,经编译创建并保存在数据库中,用户可通过指定存储过程的名字并给定参数(需要时)来调用执行。