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
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创建Event Trigger的语法如下,相比 Trigger 的语法要简单很多 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...
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...
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...
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 ...
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_...
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...
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: