From before the time of guild vaults, my guild has a group of toons that hold various related assets like recipes, patterns, and raw materials.

There's the Missing Recipes addons for finding out what recipes and patterns you're missing.

I'd like to compose a query that leverages this addon to find a list of them held by other toons in the guild, particularly the guild bank toons. (It doesn't really need the addon, since we're looking for any recipes not possessed by the toon.)

As an example, take a look at this guild:

http://sewingwitch.com/wowroster/ThudAndBlunder/

What alchemy recipes does Thudrecipes have that Concerto needs? What SQL can I use to discover that?