以连续3天为例,使用工具:mysql。
1.创建sql表:
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create table if not exists orde(id varchar (10), date datetime,orders varchar (10)); insert into orde values ( '1' , '2019/1/1' ,10 ); insert into orde values ( '1' , '2019/1/2' ,109 ); insert into orde values ( '1' , '2019/1/3' ,150 ); insert into orde values ( '1' , '2019/1/4' ,99); insert into orde values ( '1' , '2019/1/5' ,145); insert into orde values ( '1' , '2019/1/6' ,1455); insert into orde values ( '1' , '2019/1/7' ,199); insert into orde values ( '1' , '2019/1/8' ,188 ); insert into orde values ( '4' , '2019/1/1' ,10 ); insert into orde values ( '2' , '2019/1/2' ,109 ); insert into orde values ( '3' , '2019/1/3' ,150 ); insert into orde values ( '4' , '2019/1/4' ,99); insert into orde values ( '5' , '2019/1/5' ,145); insert into orde values ( '6' , '2019/1/6' ,1455); insert into orde values ( '7' , '2019/1/7' ,199); insert into orde values ( '8' , '2019/1/8' ,188 ); insert into orde values ( '9' , '2019/1/1' ,10 ); insert into orde values ( '9' , '2019/1/2' ,109 ); insert into orde values ( '9' , '2019/1/3' ,150 ); insert into orde values ( '9' , '2019/1/4' ,99); insert into orde values ( '9' , '2019/1/6' ,145); insert into orde values ( '9' , '2019/1/9' ,1455); insert into orde values ( '9' , '2019/1/10' ,199); insert into orde values ( '9' , '2019/1/13' ,188 ); |
查看数据表:
2.使用row_number() over() 排序函数计算每个id的排名,sql如下:
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select *,row_number() over(partition by id order by date ) 'rank' from orde where orders is not null ; |
查看数据表:
3.将date日期字段减去rank排名字段,sql如下:
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select *,date_sub(a. date ,interval a.rank day ) 'date_sub' from ( select *,row_number() over(partition by id order by date ) 'rank' from orde where orders is not null ) a; |
查看数据:
4.根据id和date分组并计算分组后的数量(count)、计算最早登录和最晚登录的时间,sql如下:
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select b.id, min ( date ) 'start_time' , max ( date ) 'end_time' , count (*) 'date_count' from ( select *,date_sub(a. date ,interval a.rank day ) 'date_sub' from ( select *,row_number() over(partition by id order by date ) 'rank' from orde where orders is not null ) a ) b group by b.date_sub,id having count (*) >= 3 ; |
查看数据:
参考资料:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_45456209/article/details/122218453