Aggregation query

Dear colleagues,
I would like to create the query that:
1 step: find the max of NSAVERAGE per day
2 step: max of "1st step" per NE & LAC
My tables:
A. Table "SUB"
Name Null? Type
MSC_ID NUMBER
LAC_ID NUMBER
PERIOD_START_TIME DATE
PERIOD_DURATION NUMBER
NSCURRENT NUMBER
NSAVERAGE NUMBER
B. Table NE_ID
Name Null? Type
NE_ID NUMBER
NE_NAME VARCHAR2(10)
For the 1st step I created the following query:
SELECT n.ne_name AS "MSS",
s.LAC_ID,
TO_CHAR(s.PERIOD_START_TIME,'DD.MM.YYYY') AS "DATE",
MAX(s.NSAVERAGE) AS "MAX_SUB"
FROM ne_id n JOIN SUB s
ON (n.ne_id = s.msc_id)
WHERE MOD(TO_CHAR(s.period_start_time,'J'),7)+1 ----- the weekend values are excluded
IN (1,2,3,4,5)
GROUP BY n.ne_name, s.LAC_ID, TO_CHAR(s.PERIOD_START_TIME,'DD.MM.YYYY')
ORDER BY s.LAC_ID ASC;
and now I'd like to create 2nd step: let's say, to get max of max from step1 grouped by ne_name & LAC
Could you please help how to modify my query?
Thanks
Lukasz

might be easier for people to work on your problem if you post your source data as either insert statments or a with t kind of construct.
WITH t
     AS (SELECT 'M1' mss,
                1 lac,
                TO_DATE ('2012/07/06 12:00:00', 'yyyy/mm/dd HH24:MI:SS')
                   period_start_time,
                100 nsaverage
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                1,
                TO_DATE ('2012/07/06 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                150
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                1,
                TO_DATE ('2012/07/06 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                200
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                1,
                TO_DATE ('2012/07/07 1200:00', 'yyyy/mm/dd HH24:MI:SS'),
                110
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                1,
                TO_DATE ('2012/07/07 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                100
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                1,
                TO_DATE ('2012/07/07 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                120
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                2,
                TO_DATE ('2012/07/06 1200:00', 'yyyy/mm/dd HH24:MI:SS'),
                100
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                2,
                TO_DATE ('2012/07/06 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                120
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                2,
                TO_DATE ('2012/07/06 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                200
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                2,
                TO_DATE ('2012/07/07 1200:00', 'yyyy/mm/dd HH24:MI:SS'),
                180
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                2,
                TO_DATE ('2012/07/07 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                160
           FROM DUAL
         UNION ALL
         SELECT 'M1',
                2,
                TO_DATE ('2012/07/07 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                150
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                1,
                TO_DATE ('2012/07/06 1200:00', 'yyyy/mm/dd HH24:MI:SS'),
                100
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                1,
                TO_DATE ('2012/07/06 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                150
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                1,
                TO_DATE ('2012/07/06 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                200
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                1,
                TO_DATE ('2012/07/07 1200:00', 'yyyy/mm/dd HH24:MI:SS'),
                110
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                1,
                TO_DATE ('2012/07/07 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                100
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                1,
                TO_DATE ('2012/07/07 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                120
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                2,
                TO_DATE ('2012/07/06 1200:00', 'yyyy/mm/dd HH24:MI:SS'),
                100
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                2,
                TO_DATE ('2012/07/06 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                120
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                2,
                TO_DATE ('2012/07/06 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                200
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                2,
                TO_DATE ('2012/07/07 1200:00', 'yyyy/mm/dd HH24:MI:SS'),
                180
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                2,
                TO_DATE ('2012/07/07 1300:00', 'yyyy/mm/dd HH24:MI:SS'),
                160
           FROM DUAL
         UNION ALL
         SELECT 'M2',
                2,
                TO_DATE ('2012/07/07 1400:00', 'yyyy/mm/dd HH24:MI:SS'),
                150
           FROM DUAL)

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    1. Check if a high number of Cells transferred to the OLAP (use "All data" to get value "No. of Cells")
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    how can i increse query performance other than creating aggregates
    How to improve query performance ?
    Query performance - bench marking
    may be helpful
    Regards
    C.S.Ramesh
    [email protected]

  • Order of values passed to ODCIAggregateIterate

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    a                2-abc
    a                3-abc
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    Edited by: user8092994 on Feb 23, 2009 5:11 PM

    Hi,
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    ,       WM_CONCAT (ename)     AS ename_concat
    FROM       scott.emp
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    .   DEPTNO ENAME_CONCAT
            10 CLARK,KING,MILLER
            20 SMITH,FORD,ADAMS,SCOTT,JONES
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         SELECT     deptno
         ,     ename
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                      (     PARTITION BY     deptno
                           ORDER BY       ename
                      ) AS r_num
         FROM     scott.emp
    SELECT     deptno
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                , 2
                )     AS ename_concat
    FROM     got_r_num
    WHERE     CONNECT_BY_ISLEAF     = 1
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    CONNECT BY     r_num     = PRIOR r_num + 1
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    WITH  got_concat     AS
         SELECT     deptno
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                     (       PARTITION BY     deptno
                            ORDER BY       ename
                     ) AS e_concat
         FROM     scott.emp
    SELECT       deptno
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    CLARK
    CLARK,KING
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  • Error in Running a dimension ( BIB-9509 Oracle OLAP did not create cursor.)

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  • Looking for some advice on CEP HA and Coherence cache

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