How unique is UUID?

Question

How safe is it to use UUID to uniquely identify something (I\'m using it for files uploaded to the server)? As I understand it, it is based off random numbers. However, it s

Answer 1

Been doing it for years. Never run into a problem.

I usually set up my DB's to have one table that contains all the keys and the modified dates and such. Haven't run into a problem of duplicate keys ever.

The only drawback that it has is when you are writing some queries to find some information quickly you are doing a lot of copying and pasting of the keys. You don't have the short easy to remember ids anymore.