How to solve wrong encoding in xml sheet export

Question

I have a form that receives some of registration and are transmitted to another page via ajax that makes the entry in the database. The problem is that at the time of receiving, if I do not use the utf8-Decode on the variable where you have accent will lose formatting within the database.
So far so good, the problem even begins at the time of exporting these data by phpmyadmin. Whenever I try to export it loses formatting and I did not find any combination that works.

Answer 1

Solution.
The solution found was to decode everything using UTF8-Decode when entering the data into the database and when to export choose iso-8859-1 for data standard.