thanks dear

but the problem on this solution that i dont want that table to be shown in the app, i need just a master data sheet

Steve: One way to implement serial numbers is with a normal (not virtual) column named (e.g.) Serial of type Number and an Initial value expression … Yes, i did, but I did not got this (One way to implement serial numbers is with a normal (not virtua...

which article?

Thanks for your kind reply, so what is the alternatives for this case?