Oracle数据整理

with x1 as
(select userid,startdate,coalesce(min(case when type=-1 then add_months(startdate,-1) else startdate end) over(partition by userid order by vid rows between 1 following and unbouded following),startdate+1) as minsdate, enddate as orgenddate,
case when enddate is null and (lead(type) over(partition by userid order by vid))=-1 then add_months((lead(startdate) over(partition by userid order by vid)),-1) else enddate end as enddate,type,vid,
max(vid) over(partition by userid) as max_id from test,
 x2 as
(select userid,startdate,minsdate,enddate,type,vid,max_id,
  case when (lag(enddate) over(partition by userid order by vid))<add_months(startdate,-1) then 1
  when (lag(type) over(partition by userid order by vid))=1 then null else 1 end as so from x1),
x3 as 
(select userid,vid,max_id,type,sum(so) over(partition by userid order by vid) as so,
           startdate,minsdate,
           case when minsdate<enddate and minsdate>=startdate then minsdate else enddate end as enddate
           from x2 where type=1 and startdate<=minsdate),
x4 as
(select userid,max_id,max(vid) as max_id2,sum(type) as type,
           min(startdate) keep(dense_rank first order by vid) as startdate,
           max(enddate) keep(dense_rank last order by vid) as enddate
  from x3)
select userid,to_char(startdate,‘yyyymm‘)||‘--‘||coalesce(to_char(enddate,‘yyyymm‘),‘NULL‘) as rangeSpace
from x4
where (max_id=max_id2 or startdate<=enddate) and type>-1;