-- 登录日志
DROP TABLE IF EXISTS log_login;
CREATE TABLE log_login(id INT (11) UNSIGNED NOT NULL AUTO_INCREMENT,player_id INT(11) UNSIGNED NOT NULL,last_login_time timestamp NOT NULL DEFAULT '2000-01-01 00:00:00',register_time timestamp NOT NULL DEFAULT '2000-01-01 00:00:00', PRIMARY KEY (id)
)ENGINE=MYISAM DEFAULT CHARSET=utf8;

log_login的数据在每个玩家登陆的时候产生一条，为了接下去的存储过程执行效率的考虑，冗余了每个玩家的注册时间。

-- 统计留存率
DROP TABLE IF EXISTS stat_remain;
CREATE TABLE stat_remain(id INT (11) UNSIGNED NOT NULL AUTO_INCREMENT,dru INT(11) NOT NULL, -- 每日新注册用户second_day INT(11) DEFAULT NULL,third_day INT(11) DEFAULT NULL,seventh_day INT(11) DEFAULT NULL,thirtieth_day INT(11) DEFAULT NULL,  stat_time timestamp NOT NULL DEFAULT '2000-01-01 00:00:00',add_time timestamp NOT NULL DEFAULT '2000-01-01 00:00:00', PRIMARY KEY (id)
)ENGINE=MYISAM DEFAULT CHARSET=utf8;

DELIMITER $$
-- 统计留存率
DROP PROCEDURE IF EXISTS stat_remain_player$$
CREATE PROCEDURE stat_remain_player()
BEGIN
declare i int;
SET i = 1;  insert into stat_remain(dru,stat_time,add_time) select count(a_qid),date_sub(curdate(),interval 1 day),now() from tb_fish where datediff(now(),add_time)=1;while i<30 do if (i=1) or (i=2) or (i=6) or (i=29) thenif exists(select * from stat_remain where datediff(curdate(),stat_time) =i) then                                                               update stat_remain set second_day=(select (select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i and datediff(date_add(curdate(),interval 1-i day),last_login_time)=0)/(select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i))*100 where datediff(curdate(),stat_time) =i;  update stat_remain set third_day=(select (select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i and datediff(date_add(curdate(),interval 2-i day),last_login_time)=0)/(select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i))*100 where datediff(curdate(),stat_time) =i;  update stat_remain set seventh_day=(select (select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i and datediff(date_add(curdate(),interval 6-i day),last_login_time)=0)/(select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i))*100 where datediff(curdate(),stat_time) =i;  update stat_remain set thirtieth_day=(select (select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i and datediff(date_add(curdate(),interval 29-i day),last_login_time)=0)/(select count(distinct player_id) from log_login where datediff(curdate(),register_time) =i))*100 where datediff(curdate(),stat_time) =i;  end if;
end if;
SET i = i + 1;
end while;
END
$$DELIMITER ;

stat_remain_player 存储过程在每新的一天的0点0分1秒左右去执行，生成stat_remain数据，并对离当天stat_time差距为1天，2天，6天和29天的记录进行更新。

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