Peek with filter

[qlikviewaf]

Hello,

i have this data set

i would like to define varibale "I04Date" as the lowest date on data set where surgery = I04

How this can be done?
Thank you!

Date	Surgery
23/01/2021	I04
28/01/2021	I05
02/02/2021	I23
07/02/2021	I04
12/02/2021	I04
17/02/2021
22/02/2021	I23
27/02/2021	I08

[MayilVahanan]

Hi 

Try like below

I04Date = Date(Min({<Surgery={104}>}Date))