Avoiding null and duplicate values using model clause

Hi,
I am trying to use model clause to get comma seperated list of data : following is the scenario:
testuser>select * from test1;
ID VALUE
1 Value1
2 Value2
3 Value3
4 Value4
5 Value4
6
7 value5
8
8 rows selected.
the query I have is:
testuser>with src as (
2 select distinct id,value
3 from test1
4 ),
5 t as (
6 select distinct substr(value,2) value
7 from src
8 model
9 ignore nav
10 dimension by (id)
11 measures (cast(value as varchar2(100)) value)
12 rules
13 (
14 value[any] order by id =
15 value[cv()-1] || ',' || value[cv()]
16 )
17 )
18 select max(value) oneline
19 from t;
ONELINE
Value1,Value2,Value3,Value4,Value4,,value5,
what I find is that this query has duplicate value and null (',,') coming in as data has null and duplicate value. Is there a way i can avoid the null and the duplicate values in the query output?
thanks,
Edited by: orausern on Feb 19, 2010 5:05 AM

Hi,
Try this code.
with
t as ( select substr(value,2)value,ind
        from test1
        model
        ignore nav
        dimension by (id)
        measures (cast(value as varchar2(100)) value, 0 ind)
        rules
        ( ind[any]=  instr(value[cv()-1],value[cv()]),
        value[any] order by id = value[cv()-1] || CASE WHEN value[cv()] IS NOT NULL
                                           and ind[cv()]=0     THEN ',' || value[cv()] END      
select max(value) oneline
from t;
SQL> select * from test1;
        ID VALUE
         1 Value1
         2 Value2
         3 Value3
         4 Value4
         5 Value4
         6
         7 value5
         8
8 ligne(s) sélectionnée(s).
SQL> with
  2   t as ( select substr(value,2)value,ind
  3          from test1
  4          model
  5          ignore nav
  6          dimension by (id)
  7          measures (cast(value as varchar2(100)) value, 0 ind)
  8          rules
  9          ( ind[any]=  instr(value[cv()-1],value[cv()]),
10          value[any] order by id = value[cv()-1] || CASE WHEN value[cv()] IS NOT NULL
11                                             and ind[cv()]=0     THEN ',' || value[cv()] END 
12          )
13        )
14   select max(value) oneline
15   from t;
ONELINE
Value1,Value2,Value3,Value4,value5
SQL>

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    2. Then i do have duplicate values for few fields and for this duplicate value report is showing no value. And i want to display value of the fields even if there is dupliacte values.
    How is this two options possible.
    Regards,
    Rohini

    Hi Bhanu & Anil,
    This BEx has taken away my peace from last few days. But iam enjoying with it.
    Anyways.. here is the example
    Shopping Cart no|Creation date|end date|start time|endtime
    1000574 | 06/12/2005 | 06/14/2005 | 09:19:02 | 15:39:03
            | 06/15/2005 | 06/21/2005 | 17:34:06 | 18:00:00
            |            |            | 18:01:00 | 18:15:00
    1000678 | #          | #          | #        | #  
    Here u can see third record of SC 1000574 has same start date and end date thus that fileds remain blank.
    And SC 1000678 is an example when fileds value is blank and it gives hash vaue
    Regards,
    Rohini

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