mysql- create functions, stored procedures, and views

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1.创建函数 
 mysql>delimiter //
 mysql>create function 函数名（参数1 参数1类型，...） returns 返回类型
      >begin
   >return 返回值;
   >end
   >//
 mysql>select 函数名（参数1， 参数2， 。。。）；
   >//

 

创建存数过程


 建表
create table user(
id mediumint(8) unsigned not null auto_increment,
name char(15) not null default "",
pass char(32) not null default "",
note text not null,
primary key (id)
)engine=Innodb charset=utf8;

insert into user(nsme, pass, note) values('sss','123', 'ok');

存储过程
mysql>delimiter //
mysql>create procedure proc_name (in parameter integer)
mysql>begin
mysql>if parameter=0 then
mysql>select * from user order by id asc;
mysql>else
mysql>select * from user order by id desc;
mysql>end if;
mysql>end;
mysql>//


执行：

mysql>call proc_name(0);
mysql>//

执行结果：

创建视图
      create view my_view 

         as select pass from user;


         调用视图：select v.pass from my_view v; 

         执行结果：

 

Note:

1.show procedure status; display basic information about all stored in the database stored procedures, including its database, the stored procedure name, creation time, etc.

2.show create procedure sp_name display detailed information on a stored procedure

Reproduced in: https: //my.oschina.net/garyun/blog/602891