问题
How to remove invalid Null values that are not present in database but showing in prompts in OBIEE. For some of the columns Null Values is valid but for other it is not. So i want to display null value in prompt only if it is valid.
回答1:
you will have to got to rpd and modify the column in physical layer; mark it Not Nullable (uncheck the Nullable check-box)
回答2:
If you have a limited number of possible values, you could chose Specific column Values under Options in the edit prompt dialog box.
Also, checking the box to require user input will sometimes resolve this null value problem, however this is not always the case nor is it always possible depending on your situation.
Additionally, go to Edit Dashboard Prompt, in Choice List Values drop-down list select SQL Results, then write the SQL statements as columnname is not equals to “Unspecfied” (In this way we can remove Null’s also).
Finally, you could go to the Physical Column properties in Physical Layer and Disable the Nullable option by unchecking the box.
回答3:
I prefer to work in my filter in the where statement (is not null or not like ''). Another situation you might notice is an extra blank row in the filter. This can be removed by setting the preferences is required in the prompt filter.
Good luck.
来源：https://stackoverflow.com/questions/23334021/how-to-remove-null-values-from-prompts-in-obiee