how to move data from one database field to another

I have imported a site from Thesis. My meta tags (title, description, keywords) are all in thesis fields and I would like to move them to the Infinite SEO fields.

There is a plugin that will move meta fields from one plugin's fields to another, but Infinite SEO is not on their list.

I'm good with MS Access and SQL Server, but not so much with MySQL and the way things are stored in Wordpress.

Is there a query to run, or can I copy the contents of one field to another (all at once, not one at a time!) or does anyone know of another plugin that will do it?

Thx!