I have a small problem, I have an sql database with 900 names and emails - I need to send out an email to each person in the database, but looking through the entries a lot of emails appear 3/4 times - so I dont want to do a simple while loop and send the email to these people 4 times.
I'm not sure how to approach this to make sure I only send one email per user on my system, any tips would be very helpfull.