Crystal report 11.0

I am writing a report where i am using a parameter PQAO in the record s开发者_如何学Pythonelection i have a formula uppercase({PROJ_VIEW.PQAO_NAME}) like uppercase({?PQAO} + "*")

when i put * in the parameter, it brings all the reords where PQAO is not null and is PQAO is null it will not bring back that record. How to i bring back that record. Please advise.

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add or isNull(?{PQAO}) to your selection formula