If fieldvalue exist, then you need to make a selection to show the expression:

[Bobi]

As the headline show.

I have salary structures for different countries. For some countries I have several salary structures due to big differences between for example Paris and RegionalFrance.

For some countrys i however have only one structure. Then I just choose the field country = Germany.

So I want to write an expression for the table so that If a value exist for Location (example Paris). Then I need to select Location in the filter also. Otherwise it will just show a message like "You need to select".

[Vegar]

I've attached a qvf as an example where I've used this inline data script;

Data:
LOAD * INLINE [
Country, Location,  	Amount
Germany, , 				100
France, Paris, 			100
France, RegionalFrance, 100
Sweden, , 				100
Norway, Middle, 		100
Norway, South, 			100
Norway, North, 			100
];

The show condition is: =count(Location)<=1