SQL Oracle Counting Clusters

Question

I have a data set which is based on a timestamp.

     Date                 Value
07-Jul-15 12:05:00          1  
07-Jul-15 12:10:00          1 
07-Jul-15 12:         


        

Answer 1

Hi i have tried with below code it's displaying results as expected

with cte
    as
    (
    select Rownum rn,a.* from table a 
    )
    select date1 as start_time,endtime,  (endtime-date1)*24*60 as period 
    from 
    (
    select date1,value,case 
    when 
    value=1 then
    lead(date1) over (order by date1)
    else null
    end
     as endtime
    from
    (
    select date1,value from cte where cte.rn=1
    union all
    select a.date1,a.value from cte a
    join
    cte b
    on 
    a.rn=b.rn+1
    and( (a.value=1 and b.value=0) or (a.value=0 and b.value=1)) 
    ) order by date1) where value=1