Have you used any database manager on your PC to create the database?
On the server 000webhost, within the CPanel there is a database manager called phpMyAdmin. If you can install in your PC a manager phpMyAdmin you will have easy to move the database from your PC to 000webhost.
If you've installed a web server inside your PC may already have installed the manager phpMyAdmin. Try typing in the address bar of your browser as follows:
http://localhost/phpMyAdmin or http://localhost/phpmyadmin
To upload your database to 000webhost, you must open from CPanel phpMyAdmin and import the file with the structure and data from the database that you created on your PC