Delete all but one duplicate record

Question

I have a table that is supposed to keep a trace of visitors to a given profile (user id to user id pair). It turns out my SQL query was a bit off and is producing multiple p

Answer 1

Select all unique rows
Copy them to a new temp table
Truncate original table
Copy temp table data to original table

That's what I'd do. I'm not sure if there's 1 query that would do all this for you.