给不同的段，打上标记

with access_log as (
select cust_no,visit_time,visit_id,
ROW_NUMBER() OVER (PARTITION BY cust_no order by visit_time) as row_noa
from DW_EDW.EDW_CUS_DIM_ACCESS_LOG where cust_no =20002 order by visit_time limit 10000 ) ,
t_no as (
select cust_no,visit_time,visit_id,row_noa+1 as row_nob from access_log
),
t_result as (
select a.cust_no,a.visit_time as visit_timea,b.visit_time as visit_timeb, a.visit_time - b.visit_time as visit_timec,a.row_noa,b.row_nob from access_log a full join t_no b on a.cust_no = b.cust_no and a.row_noa = b.row_nob where a.cust_no is not null
order by a.row_noa
),
t_vc as (
select cust_no,visit_timea, COALESCE(visit_timec,’00:00:00’) as visit_timec,
1 as row_vc
from t_result where cust_no is not null and visit_timec> ‘00:30:00’ order by visit_timea
),
t_new as (
select a.cust_no,a.visit_timea,a.visit_timec,COALESCE(b.row_vc,0) as r_new from t_result a left join t_vc b on a.cust_no = b.cust_no and a.visit_timea = b.visit_timea and a.visit_timec = b.visit_timec order by a.visit_timea
)
select cust_no,visit_timea,visit_timec,
sum(r_new) over (PARTITION by cust_no order by visit_timea) — 重点在这里

from t_new