mysql 儲存過程示例

在mysql的test庫中執行如下sql:

-- ----------------------------

-- table structure for user
-- ----------------------------
drop table if exists `user`;
create table `user` (
`id` int(11) unsigned not null auto_increment,
`***` tinyint(1) not null comment '1--男，2-女',
`name` varchar(255) not null,
primary key (`id`)
) engine=innodb auto_increment=4 default charset=utf8;
-- ----------------------------
-- records of user
-- ----------------------------
insert into `user` values ('1', '1', '王士大');
insert into `user` values ('2', '2', '李莉');
insert into `user` values ('3', '1', '趙東方');
-- ----------------------------
-- procedure structure for getresultfromuser
-- ----------------------------
drop procedure if exists `getresultfromuser`;
delimiter ;;
create definer=`root`@`localhost` procedure `getresultfromuser`(out result varchar(128))
begin
-- 游標所使用變數需要在定義游標之前申明
declare id int(11);
declare name varchar(20);
declare *** tinyint(1);
declare temp varchar(100) default "";
-- 遍歷資料結束標誌 注意位置順序
declare done int default false;
-- 注意用別名 因為id在上面已經有定義所以需要使用表的別名區別
declare cur_test cursor for select t.id,t.name,t.*** from user t;
-- 將結束標誌繫結到游標 
declare continue handler for not found set done = true;
open cur_test;
while done <> 1 do # 迴圈讀取游標資料
fetch cur_test into id, name,***;
if done <> 1 then
select concat(temp,id,'==') into temp;
end if;
end while;
close cur_test; 
select temp into result;
select result;
end;;delimiter ;

call getresultfromuser(@result);

執行結果如下：

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