combine two databases

Dear WP-Database Manager,

I hope your plugin can help me. I have a website with a wordpress 4.8.2 installation that has a database created in the woocommmerce plugin, and there are a substantial number of categories and sub-categories 4 levels deep. And I have a second website with wordpress 4.8.2 installation where the demo theme has a database created in the Posts function. I would like to combine all the categories and sub-categories from the first database into the second database so I don’t lose any work I have already done. Can I accomplish this with your plugin, and if yes, can you give me instructions on how to do that.

thank you.

The page I need help with: [log in to see the link]