function 不支持defualt值,可以改成set或者内部定义变量加上 defualt关键字 3. 让我来简单的说PROCEDURE可以返回值,也可以做一件事,比如几个TABLE之间的数据转来转去,而FUNCTION一定要有返回值,还只能返回一个... 4.三点与存储过程不同的地方: a,必须要一个RETURNS语句来定义返回值类型 b,不能指定参数的IN、O...
drop PROCEDURE if EXISTS test12;--使用drop 来删除存储过程或者表 create PROCEDURE test12()--创建存储过程 命名为test12BEGINset @tableNames= CONCAT('background');--'@'先在用户变量中保存值然后在以后引用它 set @beanId=6; set @sqlStr= CONCAT('select * from',@tableNames ,'where background_i...
当省略不写时,会列出MySQL数据库中存在的所有存储过程或函数的信息 #从information_schema.Routines表中查看存储过程和函数的信息 SELECT * FROM information_schema.Routines WHERE ROUTINE_NAME='存储过程或函数的名' [AND ROUTINE_TYPE = {'PROCEDURE|FUNCTION'}]; -- 注意: 如果在MySQL数据库中存在存储过程和函...
2.使用SHOWSTATUS语句查看存储过程和函数的状态信息SHOWPROCEDURESTATUS;SHOWPROCEDURESTATUSLIKE'show_max_salary';SHOWFUNCTIONSTATUSLIKE'email_by_id';#方式 3.从information_schema.Routines表中查看存储过程和函数的信息SELECT*FROMinformation_schema.RoutinesWHEREROUTINE_NAME='email_by_id'ANDROUTINE_TYPE='FUNCTION'...
1 row in set (0.00 sec) 删除: mysql> drop procedure MyProc| (注意,这里存储过程的名字是区分大小写的) 注: 如果你在和程序连接时出现: Client does not support authentication protocol requested by server; consider upgrading MySQL client [@more@] ...
51CTO博客已为您找到关于mysql的FUNCTION内调用PROCEDURE的相关内容,包含IT学习相关文档代码介绍、相关教程视频课程,以及mysql的FUNCTION内调用PROCEDURE问答内容。更多mysql的FUNCTION内调用PROCEDURE相关解答可以来51CTO博客参与分享和学习,帮助广大IT技术人实现成长和进
create procedure存储过程名称(参数列表)begin sql语句;end $$ 示例 代码语言:javascript 代码运行次数:0 运行 AI代码解释 create procedureshow_func_and_proc()begin select name,type,db from mysql.proc;end $$ 3.将语句结束符还原为; delimiter ; ...
1.procedure必须显示声明参数为in、out、或inout;function不用声明,所有参数隐式为in 2.function必须用returns定义返回值类型 3.function用return来指定返回值 'create function 及其调用 delimiter// create function querytmp() returns int begin declare ecount int; select count(*) into ecount from emp; ...
1 row in set (0.00 sec) 删除: mysql> drop procedure MyProc| (注意,这里存储过程的名字是区分大小写的) 注: 如果你在和程序连接时出现: Client does not support authentication protocol requested by server; consider upgrading MySQL client []
2) use a transactional table and have the procedure run with REPEATABLE_READ isolation level and autocommit off. The code would need to be modified to not drop the table, and before you exit, you would have to SELECT the contents (so that is returned to the client), and then immediately...