Hello everyone,
I have two sharepoint lists, sharepoint list 1 looks like this:
ID: Id of sp list
Titel: Text
Anzahl Lager: Number
Übrige Testgeräte 1: Number
Foto: Picture
And then I have a 2nd Sharepoint list 2:
RefID: Number
Titel: Text
Ausleiher Name: Text
Emailadresse: Text
Datum: Date
Anzahl ausgeliehener Testgeräte: Number
This is a 1:n relationship: SP list 1 contains all test devices with the corresponding number (1); SP list 2 tracks colleagues and their borrowed test equipment(s)
You can enter the number of devices and borrow them on a registration page. When this happens, I want the "Übrige Testgeräte 1" column to be decremented by the number entered in the corresponding text input
Example: Übrige Testgeräte 1: 20; text input 1: 5; Übrige Testgeräte 1 is reduced to 15.
How do I get that?
Thank you in advance!

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