题解 | #某宝店铺连续2天及以上购物的用户及其对应的天数#

with t1 as(
select distinct user_id,sales_date from sales_tb
order by user_id),

t2 as(
select *,
rank()over(partition by user_id order by sales_date)
as rn from t1),

t3 as (
select user_id,date_sub(sales_date,INTERVAL rn day) as dt from t2)

select user_id,count(*) as days_count  from t3 group by  user_id,dt having count(*) >=2