I want to upload WP files to webhost but how to tranfer DB too?

See the Codex article on Moving WordPress, especially the references to Backing up and Restoring your database.

Also, I found anhother two good resources for that. I done it succesful clone with this process

https://maketecheasier.com/clone-and-migrate-wordpress-blog-to-new-server/2008/01/30

https://hecode.com/how-to-create-a-full-wordpress-backup-and-restore-and-sync-them-with-localhost/

Greetings
Valentin