Sorting a column does not result in distinct values on Dashboard prompts

Question

Hi,
We have a period column, the records of which are 'JAN-02' , "FEB-02"...."DEC-09". We need sort this column in descending order in Dashboard Prompts. We have another column "Date", which has been used to sort the period column. To achieve this in descending order, we have converted Show Results from “All Values” to “SQL Results” in dashboard prmpts, then entered the below sql.
SELECT "CODE COMBINATIONS"."LINE AC PERIOD" FROM INVOICE_PAYMENTS
order by "CODE COMBINATIONS"."LINE AC DATE" desc
The above sql resulted in non-distinct values as below. Using distinct in the above sql throws syntax error.
Period
JAN-09
JAN-09
JAN-09
FEB-09
FEB-09
How do we get distinct values and in descending order??
Thanks and appreciate any ideas
Surya

Answer 1

Go to advanced tab and check "Use distinct clause" that will fire a distinct to the query.
In the rpd month logical column , there is an option called sort order in the general properties and you need to specify the date column if you need to sort it based on the date column and in the Answers you can simply enable Descending sort order on the same column. That should take care of it
Hope it helps
Thanks
Prash