This is the top five of the most common errors during the connection process to MySQL database server.

1. 2003 Can't connect to MySQL server on.
2. Lost connection to MySQL server during query.
3. 1045 Access denied for user.
4. Host xxx is not allowed to connect to this MySQL.
5. MySQL server has gone away.

The most common error in mysql server is "Can't connect to MySQL server on 'localhost' (10061)", this happen when you attempt to connect to the MySQL database Server.