please how do i change database host and password
If you want to make changes on your server then you will need to contact your hosting provider.
If you want to make changes in QloApps then please be more specific where.
If possible please share screenshot.
i'm using localhost and i want to host it... so i want to transfer the tables and all records to an online server
Please take the help of this guide to migrate your server.
If still, you face any issue then let us know.