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 ...
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
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 ...
delimiter ; procedure delimiter // createprocedureup_pro (inin_namevarchar(30),out out_numint) MODIFIES SQL DATA BEGIN SET@count_name = (selectcount(1)fromt1wherename= in_name); INSERTINTOt(name)values(in_name); if@count_name = 0then insertintot1(name,num)values(in_name,1); else s...
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CREATEEVENTTRIGGERnameONevent[WHENfilter_variableIN(filter_value[,...])[AND...]]EXECUTE{FUNCTION|PROCEDURE}function_name() event 表示触发事件,目前仅支持 ddl_command_start、ddl_command_end、table_rewrite 和 sql_drop WHEN filter_variable 用于过滤部分事件,当前仅支持 TAG 变量 ...
Hi,i take an error when execute dynamic sql in mysql trigger(actually in sql procedure,procedure is called by triiger.) mysql version is:5.7.22 Is there any solutions can resolve the problem? Thanks very much. the code is bellow:
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...
The name of the WLM environment is an SQL identifier. If you do not specify WLM ENVIRONMENT FOR DEBUG MODE, Db2 uses the default WLM-established stored procedure address space specified at installation time. You must have the appropriate authority for the WLM application environment. The WLM ...
CREATE PROCEDURE testCreate (IN viewName VARCHAR(100)) BEGIN Create Trigger insertOrgUsers before Insert on fn.userstemp for each row SET NEW.organization_id = getOrgId() END And I get the error: Error code 1303, SQL state 2F003: Can't create a TRIGGER from within another stored routine...