ERROR 1049 (42000): Unknown database 'mydatabasename'

Question

I am trying to restore database from .sql file , i have created the database in phpmyadmin and also using the create if not exist command in the .sql file which i am restori

Answer 1

Whatever the name of your dump file, it's the content which does matter.

You need to check your mydatabase.sql and find this line :

USE mydatabasename;

This name does matter, and it's the one you must use in your command :

mysql -uroot -pmypassword mydatabasename

Two options for you :

1. Remove USE mydatabasename; in your dump, and keep using :
   mysql -uroot -pmypassword mydatabase
2. Change your local database name to fit the one in your SQL dump, and use :
   mysql -uroot -pmypassword mydatabasename