How to detect duplicate data?

Question

I have got a simple contacts database but I\'m having problems with users entering in duplicate data. I have implemented a simple data comparison but unfortunately the duplicate

Answer 1

While I do not have an algorithm for you, my first action would be to take a look at the process involved in entering a new contact. Perhaps users do not have an easy way to find the contact they are looking for. Much like on Stack Overflow's new question form, you could suggest contacts that already exist on the new contact screen.