Identifying variables that serve as unique identifiers

[Johan Moller]

Hello everyone


I want to write a program that accepts numeric and string variables as input, that works for arbitrary number of variables, identifies unique values of each variable, displays variable/s that uniquely identify/ies observations and that also works if two or more variables are unique identifiers.

Any idea ?

Kind regards

Johann

[Mike Lacy]

See the built-in commands -isid-, -duplicates-, and -levelsof-, any of which might be of use to you here.. The user-written -distinct- might also be relevant. I don't suspect it's necessary to write a program.