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:
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