Cannot get wanted data with MAX and GROUP BY function

Question

Hi
All
I have a table like below:
COLUMN     TYPE
USER_ID     VARCHAR2 (10 Byte)
PROCESS_ID     VARCHAR2 (30 Byte)
END_TIME     DATE(STAMP)
TO_LOC     VARCHAR2 (12 Byte)
TO_LOC_TYPE     VARCHAR2 (15 Byte)
FROM_LOC      VARCHAR2 (12 Byte)
ITEM_ID     VARCHAR2 (25 Byte)
CASES     NUMBER (12,4)
LMS_UDA1      VARCHAR2 (250 Byte)
ZONE     VARCHAR2 (2 Byte)
I only want get one record with all columns, only have one clause MAX(END_TIME)
But the other column have difference value.
when i use MAX(END_TIME) and GROUP BY USER_ID,PROCESS_ID,CASES,....
the sql didnot give one record,
It give many records
Please help me on this
Regards
Saven

Answer 1

Hi, Saven,
Sorry, it's unclear what you want.
Whenever you have a question, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all the tables involved, and the results you want from that data.
Explain, using specific examples, how you get those results from that data.
If you can show your proiblem using commonly available tables, like those in the scott or hr schamas, then you don't have to post any sample data: just the results and the explanation.
Always say what version of Oracle you're using.
See the forum FAQ {message:id=9360002}
Are you trying to see all data related to the highest (that is, latest) end_time?
I think you want something like this, that finds all the ionformation about the employee with the latest hiredate:
WITH     got_r_num     AS
     SELECT     emp.*
     ,     ROW_NUMBER () OVER (ORDER BY  hiredate  DESC  NULLS LAST)
               AS r_num
     FROM     scott.emp
SELECT     *     -- Or list all columns except r_num
FROM     got_r_num
WHERE     r_num     = 1
;What do you want in case of a tie, that is, if 2 or more rows have the same latest end_time? You may need to add tie-breaking expressions to the analytic ORDER BY clause, and/or use RANK instead of ROW_NUMEBR