SQL prompts show no data OBIEE 11.1.1.6

Question

Dear Gurus,
I have prompt with parameters like:
Province
City
Hospital Name
I want Hospital Name parameter filtered by Province & City so I use this in my Sql Prompts Syntax:
SELECT "Dim Hospital"."Hospital Name" FROM "eHealth CCD Vital Sign" WHERE "Dim Region"."Province"='{v_province}'
I tested it and it show no data (appear search....) in Hospital Name drop down.
I run it in Firefox, IE, Chrome, still the same.
It work when I remove WHERE from the syntax.
Is this bugs?
I use obiee 11.1.1.6.0
Any help will be appreciated
Regards
JOE
NB:Sory I have post in wrong section, already move it in OBIEE Foundation.
Edited by: JoeSSI on Nov 21, 2012 6:55 PM

Answer 1

If Hospital and Province are columns in the same prompt, you can use the 'Limit values by' functionality in the Hospital column criteria(along with All column values instead of SQL results) and choose Province (or All prompts if indeed need to restrict by all other columns in that prompt). This way the Hospital column will be restricted based on Province as soon as Province is selected (ie without hitting Apply)
If Hospital and Province are in different prompts then you can use the presentation variable and SQL results method you have been trying.
Increase the logging level for the user and check what physical query is being fired for populating the Hospital column.