Create SQL query for the given dataset

Question

I have below dataset available.

I want to get below result.

I am trying to get the results using windowing functions, but am not able to find a way to do it. Can someone please help.!

Answer 1

Use row_number() to generate a sequence and subtract from value . That is a constant for the groups you want:

select element, min(value), max(value)
from (select t.*,
             row_number() over (partition by element order by value) as seqnum
      from t
     ) t
group by element, (value - seqnum)