SQL query for users who have placed orders for at least seven consecutive days

 create table order(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 )

 select *,date-rankrnk from (select *,row_number() over(partition by id order by date) rankfrom orde) a;

 select id,rnk,count(*) ok from 
(select *,date-rankrnk from (select *,row_number() over(partition by id order by date) rankfrom orde) a) b group by id,rnk;

 select id,rnk from 
(select *,date-rankrnk from (select *,row_number() over(partition by id order by date) rankfrom orde) a) b group by id,rnk having count(*)>=7;