Using functions from Combo Box 'Others:'

Question

I am trying to use function DENSE_RANK in OWB 9.0.3.33.0. Unfortunately I can not find properly aropriate object form tool box palette. I tried to use JOIN, FILTER, EXPRESSION. Mostly I get error: PL/SQL: ORA-30483: window functions are not properly here.
I am trying to numerate my records in a set. In SQL I can write clause:
SELECT ID,DATE_VAL, OPERATE,
DENSE_RANK() OVER (PARTITION BY ID ORDER BY ID, DAT_VAL DESC) "MY_LEVEL"
FROM (
SELECT ID, DATE_FROM DATE_VAL, 'U' "OPERATE"
FROM SCH.P1
WHERE DATA_FROM = (SELECT MAX(DATA_FROM)
FROM SCH.P1)
UNION                                        
SELECT ID, DATE_VAL,'I' "OPERATE"
FROM [email protected] )
ORDER BY ID,DATE_VAL DESC
Does anybody can tell me how properly I can to use DENSE_RANK() funcion in OWB and get "MY_LEVEL" pseudo column?
Thank very much for any advice.
Peter.
-Poland-

Answer 1

Thank You for replay.
I looked at documentation and I saw that DENSE_RANK is in the list aggregate functions. I mean You want to tell me that version of DENSE_RANK what I use is wrong but my question is about OWB.
In window "Expression Builder" You can use some of functions. If You add to mapping JOIN object in Expression Builder window You can write join condition. In combo box list called "Others", there is DENSE_RANK in the list. After You select this and paste to window OWB generate code like:
DENSE_RANK() OVER (
[PARTITION BY <value expression1> [, ...]]
ORDER BY <value expression2> [collate clause] ASC
[NULLS FIRST|NULLS LAST] [, ...] )
I am confused.
I still do not know what OWB object I can use to get "My level" pseudo column.
Regards
Peter