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mysql中循环截取用户信息并插入到目标表对应的字段中_MySQL

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Release: 2016-06-01 13:06:00
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操作环境:有表game_list,字段:uid,score1,score2,seat_id,last_update;
传入参数为i_player_detail ,传入的值为多个用户的id、之前分数、之后分数、座位号,每个用户的数据用分号(;)隔开;
操作目的:将各个用户对应的属性插入到目标表对应的字段中,last_update为数据更新日期;
传入参数i_player_detail ,里面存放多个用户的信息,每个用户的一组数据用分号隔开,每个用户的信息多个,比如
“用户id,score,desk,seat;
用户id,score,desk,seat;……”

-- 使用存储过程
delimiter $$

use `log_pdk`$$

drop procedure if exists `game_c`$$

create procedure `game_c` (in i_player_detail varchar(500))
SQL SECURITY INVOKER
BEGIN

DROP TABLE IF EXISTS `temp_list`;

--创建临时表,将截取的数据先插入到临时表
CREATE TEMPORARY TABLE `temp_list`(
`uid` INT(10) UNSIGNED NOT NULL,
`score1` INT(10) UNSIGNED NOT NULL,
`score2` INT(10) UNSIGNED NOT NULL,
`seat_id` TINYINT(3) UNSIGNED NOT NULL
);

-- declare str varchar(500);-- 用来拼接sql动态语句
declare m_detail varchar(500);
declare m_num tinyint;

-- 当传入的用户信息字符串中含有分号';',进行截取
set m_num = position(';' in str) -- 不存在分号的时候,返回0
while m_num >= 1 do
begin
set @str = 'insert into temp_list values (' + substring(m_detail,1,m_num-1)+')' -- 截取第一个用户的信息(第一个分号前面的字符),插入到临时表
prepare statement1 from @str;
execute statement1;
deallocate prepare statement1;
set m_detail = substring(m_detail,m_num+1); -- 定义除去第一个用户和分号那部分的字符串
set set m_num = position(';' in str);
end while;

-- 从临时表抽出所有字段,添加时间字段,插入到表game_list
INSERT INTO `game_list`(`uid`,`score1`,`score2`,`seat_id`, `last_update`)
SELECT `uid`, `score1`, `score2`, `seat_id`, current_date() 
FROM `temp_list`;
end$$
delimiter ;
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