-- Mysql 存储过程 /* set @result = 0; create procedure login( -- 定义参数，有in、out、inout三种类型 in user varchar(10), in pass varchar(10), out result int ) begin declare passd varchar(10);-- declare 声明临时变量、类型，然后用set 进行赋值，declare 临时变量只能放在begin end 区域中，而其作用域也只是在begin end 中, 而 set @ 定义的变量是全局变量 select password into passd from login where username=user; if passd like pass then -- If 语句，后面要加上 End IF,就像是case 后也要加 End Case 一样 select ‘Login Success‘ as Massage; set result = 1; else select ‘Login Failed‘ as Message; set result =0; end if; end; */ -- 调用存储过程 call login(‘root‘,‘root‘,@result); -- 删除存储过程 drop procedure login create procedure translate( id int ) begin case id when 1 then select ‘one‘ as trans; when 2 then select ‘two‘ as trans; when 3 then select ‘three‘ as trans; else select ‘no trans‘ as trans; end case; end; /* case 用法有两种： 1. 条件变量在when 中 select name, case when age>10 then xxxxx else xxxxxx end case 2. 条件变量在case 中 select name,case age when >10 then xxx else xxxxxs end case */
原文：https://www.cnblogs.com/DSC1991/p/9285195.html