Use Parameter to get values

Hi,

I have a report where a parameter A is set and displaying correct text value which is dynamic depending on user request.

This means if user select a value then the parameter will display the related value for this report from the DB.

Now, I want to use this A parameter to get its related values displayed as a text in the report.

When the parameter A has for example an XXX value, in the DB in a different table I know this XXX is linked to 2 values always.

As the values of the parameters are dynamic, it's assumed if the value of parameter A is now YYY then this YYY is linked to 2 other different values but always same for YYY.

Now what I want to do simply, is to get the value of the parameter A (for example XXX) then use this value to look for the 2 related values to XXX in another table and display them.

Thank you for your help!!