Fetch first and last record together

Question

Hi All,
I want to fetch first and last records. I have done through ROWNUM, but I need some alternative ways, may be through RANK function.
Please help on this.
here sample data:
WITH t AS
(SELECT 100 sid, 'ABC' SNAME,  4 status_id, SYSDATE + 1/24 start_date FROM dual UNION ALL
SELECT 100  sid, 'ABC' SNAME,  5 status_id ,SYSDATE + 2/24 start_date FROM dual UNION ALL
SELECT 100  sid, 'ABC' SNAME,  6 status_id ,SYSDATE + 3/24 start_date FROM dual UNION ALL
SELECT 100  sid, 'ABC' SNAME,  7 status_id ,SYSDATE + 3/24 start_date FROM dual UNION ALL
SELECT 100  sid, 'ABC' SNAME,  8 status_id ,SYSDATE + 4/24 start_date FROM dual)
SELECT * FROM t ORDER BY start_date;Thanks,

Answer 1

if you want all the info on the same row.
/* Formatted on 10/19/2011 7:06:50 AM (QP5 v5.149.1003.31008) */
WITH t AS (SELECT 100 sid,
                  'ABC' SNAME,
                  4 status_id,
                  SYSDATE + 1 / 24 start_date
             FROM DUAL
           UNION ALL
           SELECT 100 sid,
                  'ABC' SNAME,
                  5 status_id,
                  SYSDATE + 2 / 24 start_date
             FROM DUAL
           UNION ALL
           SELECT 100 sid,
                  'ABC' SNAME,
                  6 status_id,
                  SYSDATE + 3 / 24 start_date
             FROM DUAL
           UNION ALL
           SELECT 100 sid,
                  'ABC' SNAME,
                  7 status_id,
                  SYSDATE + 3 / 24 start_date
             FROM DUAL
           UNION ALL
           SELECT 100 sid,
                  'ABC' SNAME,
                  8 status_id,
                  SYSDATE + 4 / 24 start_date
             FROM DUAL)
  SELECT sid,
         sname,
         MIN (status_id) KEEP (DENSE_RANK FIRST ORDER BY start_date) min_status,
         MIN (start_date) min_dt,
         MAX (status_id) KEEP (DENSE_RANK FIRST ORDER BY start_date DESC)
            max_status,
         MAX (start_date) max_dt
    FROM t
GROUP BY sid, sname
SID     SNAME     MIN_STATUS     MIN_DT     MAX_STATUS     MAX_DT
100     ABC     4     10/19/2011 8:05:54 AM     8     10/19/2011 11:05:54 AMEdited by: pollywog on Oct 19, 2011 7:11 AM