(1) To upload your old database in your new Odoo website, you can follow these steps:

1. Install the same version of Odoo on your new machine that you used for your old website. This is important because database migrations between different versions of Odoo can be complicated.

2. Backup your old Odoo database. You can do this from the Odoo user interface or by using the pg_dump command if you have access to the server.

3. Transfer the database backup file to your new machine.

4. Restore the database backup file on your new machine. You can do this using the pg_restore command or by using the Odoo user interface.

5. Once the database is restored, you can access your old data in your new Odoo website.

It's important to note that depending on the version of Odoo you were using, some of your old data might not be compatible with the new version of Odoo. In this case, you may need to convert your data to the new format before importing it into the new website.


(2) Even if you can upload your old database in your new website by using the import feature. You can find this feature by going to Settings > General Settings > Import/Export > Import.

You can then select the file that you downloaded from your old website and map the fields to the corresponding fields in Odoo.

Let me know if you have any other questions!

Hi,

You can migrate the database using open upgrade.(If you are using community version of odoo)

Please refer this blog : 

https://www.cybrosys.com/blog/how-to-migrate-odoo-database-using-openupgrade

If you are created your old database in enterprise edition, then you can use the following service

https://upgrade.odoo.com/

Hope this would be helpful.

Hi Bavin. Thank you very much for your help. Is there any way I can automatize these steps? For example, how do I install the old version in my new machine? 

Where is the pg_dump command in the old machine?

Thank you very much.