Using Sql Result and Limit Value in Prompt OBIEE 11.1.1.5

Dear Gurus,
I have prompt hierarchy like this:
Year
Quarter
Month
Which are using limit value (Quarter depend on Year, Month depend on Quarter), but I have issue because appear null also in those prompt
I have checked my database, view, repository there are not null.
My questions is, how to remove null in prompt when sql result can't use together with limit value, I don't know how to remove it using column filter.
NB:I already using presentation variable in sql result in order to remove null and using constraint, but it show nothing in prompt view unless we press apply button.
So I don't use this
Please help, kindly appreciated
JOE
Edited by: JoeSSI on Mar 27, 2012 2:03 AM

Hi,
Can you edit your prompt here you can find show option then select SQL Result please modify statement like below.
SELECT your column name FROM subject area where your column name is not null
Go--> Edit your prompt--> Show--> Select Sql result---> change statement like above.
Second way.
Go to physical layer then double click your column name here you can find *"nullable"* option please check that.
Go--> Physical Layer--> Extract table --> select your column name-->double click your column name--> here you can find option like Nullable please check it.
Award points it is useful.
Thanks,
Satya

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Thanks for your help. Finally I solve this issue of
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