Firstsortedvalue application on a table

[canmarroig]

I need to find the shop where my customer have been the last time, based on the max date of my receipt, i've build this simple function but it doesn't run: 

=firstsortedvalue([Receipt_date],[Shop_name])  then i've tried to find the max receipt_date but in firstsortedvalue there is already the max function i suppose, can you help me? 

[Kushal_Chawda · Accepted solution]

@canmarroig  just swap the parameter with bit modification. read more about this function in qlik help site

=firstsortedvalue([Shop_name],-[Receipt_date]) 

[canmarroig]

Thank you i've checked different examples, but i did't understand.