Turn a DB insert step into an update step

Sometimes I have huge tables I am inserting data into, and they are in a condition, so if the record exists, update it, else, insert a new record.

The insert and update steps are almost identical, so would there be a simple way to add functionality do duplicate an insert step and change it into an update step rather with all the same parameters.

I know I could have added this as a feature request, but it my be too dumb an idea to make it to a feature request depending on what feedback I get.