It seems like you are trying to create a new database on your SQL backup and your database user does not have the proper permission to do so.
If this was not your intention (if the database already exists and you only need to import the tables)
Try removing this part at the beginning of your sql file:
CREATE DATABASE db506384322 DEFAULT CHARACTER SET latin1 COLLATE latin1_general_ci
and save your sql file.
Go to phpmyadmin, click on the database, and import the sql file.