Combine rows when the end time of one is the start time of another (Oracle)

Question

I just can\'t seem to get this query figured out. I need to combine rows of time-consecutive states into a single state.

This question is similar to the question fou

Answer 1

Maybe this? (I don't have a SQL machine to run it on)

WITH
  sequenced_data AS
(
  SELECT
    ROW_NUMBER() OVER (PARTITION BY name                ORDER BY start_inst) NameSequenceID,
    ROW_NUMBER() OVER (PARTITION BY name, code, subcode ORDER BY start_inst) NameStateSequenceID,
    *
  FROM
    data
)
SELECT
  name,
  MIN(start_inst) start_inst,
  MAX(end_inst)   end_inst,
  code,
  subcode
FROM
  sequenced_data
GROUP BY
  name,
  code,
  subcode,
  NameSequenceID - NameStateSequenceID