Assign alphabet

[snerdya]

Hi. In the system im making for my company, I need to assign 3 alphabet to each product. And the alphabet is assign just like running number for example one product is assigned with ABC then the next product registered will be ABD and it continues. can anyone help me how to do this? Thank you.

[Hussein_Osseily]

You can add a column with an expression using one of below different types of keys: 

https://support.google.com/appsheet/answer/10106672?hl=en#system-generated-key 

[Steve]

There is no easy way to do this with AppSheet.