Select first and last records in grouped results - Oracle 11g

Question

Say I have the following information in an Oracle 11g table:
Qty
Production order
Date and time
20
00000000000000001
12-JAN-14 00:02
20
00000000000000001
12-JAN-14 00:05
20
00000000000000001
12-JAN-14 00:07
20
00000000000000001
13-JAN-14 00:09
30
00000000000000002
12-JAN-14 00:11
30
00000000000000002
12-JAN-14 00:15
30
00000000000000002
12-JAN-14 00:20
30
00000000000000002
14-JAN-14 00:29
I would like to write a query that would return the following:
Qty
Production order
First
Last
80
00000000000000001
12-JAN-14 00:02
13-JAN-14 00:09
120
00000000000000002
12-JAN-14 00:11
14-JAN-14 00:29
That is, the sum of the Qty column grouped by Production order, and the date/time of the first and last records for each Production order.
I came up with a query that yielded this result:
Qty
Production order
First
Last
80
00000000000000001
12-JAN-14 00:02
14-JAN-14 00:29
120
00000000000000002
12-JAN-14 00:02
14-JAN-14 00:29
Which means that the First and Last columns show the overall first and last date / time of the whole table. Please note that this is a dummy table. Sorry I am now allowed to write the actual query
I came up with since work policies do not allow me to share it. Also, I tried with windowing functions such as rank()and row_number() but my user does not have enough privileges to do so.
Any help or hints will be greatly appreciated.

Answer 1

Due to the fact that Oracle does not record the rows in any particular order, it would be wrong that the "first date" would be the first row processed by the query.
Therefore you would have to supply some other column if you do not want to consider the table as ordered by date.
Also, any analytical functions will need you to supply the "order by" and if its the date, then just a simple query will do:
SQL>WITH Tab1 (Qty, Production_Order, Pdate)
  2       AS (SELECT 20, '00000000000000001', TO_DATE ( '12-JAN-14 00:02', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
  3           SELECT 20, '00000000000000001', TO_DATE ( '12-JAN-14 00:05', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
  4           SELECT 20, '00000000000000001', TO_DATE ( '12-JAN-14 00:07', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
  5           SELECT 20, '00000000000000001', TO_DATE ( '13-JAN-14 00:09', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
  6           SELECT 30, '00000000000000002', TO_DATE ( '12-JAN-14 00:11', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
  7           SELECT 30, '00000000000000002', TO_DATE ( '12-JAN-14 00:15', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
  8           SELECT 30, '00000000000000002', TO_DATE ( '12-JAN-14 00:20', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
  9           SELECT 30, '00000000000000002', TO_DATE ( '14-JAN-14 00:29', 'DD-MON-YY HH24:MI') FROM DUAL)
10  SELECT   SUM ( Qty), Production_Order, MIN ( Pdate), MAX ( Pdate)
11      FROM Tab1
12  GROUP BY Production_Order
13* ORDER BY Production_Order
SQL> /
  SUM(QTY) PRODUCTION_ORDER     MIN(PDATE)                    MAX(PDATE)
        80 00000000000000001    12-Jan-2014 00:02:00          13-Jan-2014 00:09:00
       120 00000000000000002    12-Jan-2014 00:11:00          14-Jan-2014 00:29:00