MYSQL实现连续签到功能断签⼀天从头开始（sql语句）1，创建测试表
CREATE TABLE `testsign` (
`userid` int(5) DEFAULT NULL,
`username` varchar(20) DEFAULT NULL,
`signtime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`type` int(1) DEFAULT '0' COMMENT '为0表⽰签到数据，1表⽰签到⽇期字典数据'
) ENGINE=InnoDB DEFAULT CHARSET=utf8
2，插⼊测试数据，签到时间为5.21号到6.5号，可以写活，但是要写存储过程，我⽐较懒，重点应该是取签到数据的代码，就是第三点，呵呵
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-21 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-22 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-23 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-24 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-25 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-26 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-27 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-28 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-29 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-30 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-05-31 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-06-01 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-06-02 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-06-03 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-06-04 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('72164','字典','2017-06-05 00:00:00','1');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('800675','吴⼩双签到数据','2017-05-21 00:00:00','0');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('800675','吴⼩双签到数据','2017-05-22 00:00:00','0');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('800675','吴⼩双签到数据','2017-05-23 00:00:00','0');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('800675','吴⼩双签到数据','2017-05-24 00:00:00','0');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('800675','吴⼩双签到数据','2017-05-25 00:00:00','0');
insert into `testsign` (`userid`, `username`, `signtime`, `type`) values('800675','吴⼩双签到数据','2017-05-26 00:00:00','0');
3，查询连续签到数据
SELECT * FROM testsign WHERE TYPE=0 AND
DATE_FORMAT(signtime,'%Y%m%d')>(
SELECT IFNULL(MAX(DATE_FORMAT(signtime,'%Y%m%d')),"20170520") FROM testsign WHERE TYPE=1
sql语句的功能有AND DATE_FORMAT(signtime,'%Y%m%d')<=DATE_ADD(NOW(), INTERVAL -1 DAY)
AND DATE_FORMAT(signtime,'%Y%m%d') NOT IN (
SELECT DATE_FORMAT(signtime,'%Y%m%d') FROM testsign WHERE TYPE=0 AND userid=800675
)
)
AND DATE_FORMAT(signtime,'%Y%m%d')<='20170605'
AND userid=800675
未断数据
删掉23号数据，从24号开始算，连续签三天
以上所述是⼩编给⼤家介绍的MYSQL实现连续签到功能断签⼀天从头开始，希望对⼤家有所帮助，如果⼤家有任何疑问请给我留⾔，⼩编会及时回复⼤家的。在此也⾮常感谢⼤家对⽹站的⽀持！