mysql计算连续天数，mysql连续登录天数，连续天数统计

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蕃薯耀 2016年11月28日 09:29:10 星期一

http://fanshuyao.iteye.com/

mysql计算连续天数，mysql连续登录天数，连续天数统计：

http://fanshuyao.iteye.com/blog/2341455

Oracle计算连续天数，计算连续时间，Oracle连续天数统计

http://fanshuyao.iteye.com/blog/2341163

一、表结构及初始化数据

DROP TABLE user_login; CREATE TABLE user_login( pid INT NOT NULL, login_time DATETIME NOT NULL ); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-25 13:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-24 13:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-24 10:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-24 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-23 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-10 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-09 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-11-01 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(1,'2016-10-31 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-25 13:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-24 13:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-23 10:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-22 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-21 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-20 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-19 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-02 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-11-01 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-10-31 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-10-30 09:30:45'); INSERT INTO user_login(pid, login_time) VALUES(2,'2016-10-29 09:30:45');

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DROPTABLEuser_login;CREATETABLEuser_login(pidINTNOTNULL,login_timeDATETIMENOTNULL);INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-25 13:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-24 13:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-24 10:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-24 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-23 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-10 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-09 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-11-01 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(1,'2016-10-31 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-25 13:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-24 13:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-23 10:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-22 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-21 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-20 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-19 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-02 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-11-01 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-10-31 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-10-30 09:30:45');INSERTINTOuser_login(pid,login_time)VALUES(2,'2016-10-29 09:30:45');

二、封装计算连续天数的方法

DELIMITER $$ CREATE FUNCTION f_continuty_days(id INT, start_time DATE, end_time DATE) RETURNS INT BEGIN DECLARE days INT; DECLARE flag INT; DECLARE previous_day DATE; SET days := 0; SET flag := 1; SET previous_day := DATE_SUB(end_time,INTERVAL 1 DAY); WHILE flag>0 DO SELECT COUNT(DISTINCT(DATE(login_time))) INTO flag FROM user_login WHERE pid = id AND DATE(login_time) = previous_day ; IF flag > 0 THEN SET days := days + 1; SET previous_day := DATE_SUB(previous_day,INTERVAL 1 DAY); END IF; END WHILE; RETURN days; END$$ DELIMITER ;

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DELIMITER$$CREATEFUNCTIONf_continuty_days(idINT,start_timeDATE,end_timeDATE)RETURNSINTBEGINDECLAREdaysINT;DECLAREflagINT;DECLAREprevious_dayDATE;SETdays:=0;SETflag:=1;SETprevious_day:=DATE_SUB(end_time,INTERVAL1DAY);WHILEflag>0DOSELECTCOUNT(DISTINCT(DATE(login_time)))INTOflagFROMuser_loginWHEREpid=idANDDATE(login_time)=previous_day;IFflag>0THENSETdays:=days+1;SETprevious_day:=DATE_SUB(previous_day,INTERVAL1DAY);ENDIF;ENDWHILE;RETURNdays;END$$DELIMITER;

三、调用方法

把用户pid、开始时间、结束时间参数传进去。

SELECT f_continuty_days(1,DATE('2016-10-01'),DATE('2016-11-25'));

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SELECTf_continuty_days(1,DATE('2016-10-01'),DATE('2016-11-25'));

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蕃薯耀 2016年11月28日 09:29:10 星期一

http://fanshuyao.iteye.com/