Oracle 21c

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CREATE TABLE table_name (ID, PREV_End_Time, Start_Time, End_Time, Position) AS
SELECT 1, DATE '2022-01-01' + INTERVAL '10:00' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '10:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '11:30' HOUR TO MINUTE, 'Start' FROM DUAL UNION ALL
SELECT 1, DATE '2022-01-01' + INTERVAL '12:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '13:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '14:30' HOUR TO MINUTE, NULL    FROM DUAL UNION ALL
SELECT 1, DATE '2022-01-01' + INTERVAL '15:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '16:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '17:30' HOUR TO MINUTE, 'End'   FROM DUAL UNION ALL
SELECT 1, DATE '2022-01-01' + INTERVAL '18:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '19:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '20:30' HOUR TO MINUTE, 'Start' FROM DUAL UNION ALL
SELECT 1, DATE '2022-01-01' + INTERVAL '21:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '22:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '23:30' HOUR TO MINUTE, NULL    FROM DUAL UNION ALL
SELECT 1, DATE '2022-01-02' + INTERVAL '00:30' HOUR TO MINUTE, DATE '2022-01-02' + INTERVAL '01:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '02:30' HOUR TO MINUTE, NULL    FROM DUAL UNION ALL
SELECT 1, DATE '2022-01-02' + INTERVAL '03:30' HOUR TO MINUTE, DATE '2022-01-02' + INTERVAL '04:30' HOUR TO MINUTE, DATE '2022-01-01' + INTERVAL '05:30' HOUR TO MINUTE, 'End'   FROM DUAL;
7 rows affected

ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD HH24:MI:SS';
SELECT ID,
       PREV_End_Time,
       Start_Time,
       End_Time,
       Position,
       Leg,
       Trip
FROM   table_name
MATCH_RECOGNIZE(
  PARTITION BY ID
  ORDER     BY start_time
  MEASURES
    MATCH_NUMBER() AS trip,
    COUNT(*) AS leg
  ALL ROWS PER MATCH
  PATTERN (start_row intermediate_row* end_row)
  DEFINE
    start_row        AS position = 'Start',
    intermediate_row AS position IS NULL,
    end_row          AS position = 'End'
)


ID
PREV_END_TIME
START_TIME
END_TIME
POSITION
LEG
TRIP


1
2022-01-01 10:00:00
2022-01-01 10:30:00
2022-01-01 11:30:00
Start
1
1

1
2022-01-01 12:30:00
2022-01-01 13:30:00
2022-01-01 14:30:00
null
2
1

1
2022-01-01 15:30:00
2022-01-01 16:30:00
2022-01-01 17:30:00
End
3
1

1
2022-01-01 18:30:00
2022-01-01 19:30:00
2022-01-01 20:30:00
Start
1
2

1
2022-01-01 21:30:00
2022-01-01 22:30:00
2022-01-01 23:30:00
null
2
2

1
2022-01-02 00:30:00
2022-01-02 01:30:00
2022-01-01 02:30:00
null
3
2

1
2022-01-02 03:30:00
2022-01-02 04:30:00
2022-01-01 05:30:00
End
4
2

ID	PREV_END_TIME	START_TIME	END_TIME	POSITION	LEG	TRIP
1	2022-01-01 10:00:00	2022-01-01 10:30:00	2022-01-01 11:30:00	Start	1	1
1	2022-01-01 12:30:00	2022-01-01 13:30:00	2022-01-01 14:30:00	null	2	1
1	2022-01-01 15:30:00	2022-01-01 16:30:00	2022-01-01 17:30:00	End	3	1
1	2022-01-01 18:30:00	2022-01-01 19:30:00	2022-01-01 20:30:00	Start	1	2
1	2022-01-01 21:30:00	2022-01-01 22:30:00	2022-01-01 23:30:00	null	2	2
1	2022-01-02 00:30:00	2022-01-02 01:30:00	2022-01-01 02:30:00	null	3	2
1	2022-01-02 03:30:00	2022-01-02 04:30:00	2022-01-01 05:30:00	End	4	2