How to show a notifier if scan data match?

[asifkabir008 (Asif Kabir)]

I am using the Barcode Scanner to scan data from QR and showing them on the screen. The Time Stamp is getting added to a spreadsheet with the scanned data. But I want to check if the data has already been scanned or not. If it is already added in the spreadsheet I want to show a notifier. How can I do that? I am really facing difficulties.

[asimjib93 (Asim Jib)]

@asifkabir008

The Time Stamp is getting added to a spreadsheet with the scanned data.

So, you’re storing private data from users?

@asifkabir008

I want to check if the data has already been scanned or not

Just after the scan completed, find the result texts in your database. If it match with any previous record, then you can show a notifier.

[asifkabir008 (Asif Kabir)]

Um not storing any private data, the QR codes have the users email and a given id only. BTW i have figured out a way to do it.