I'd like to be able to insert queries onto forms. Therefore, I'd like to request that you create a new attribute type called "Query". This would work like a shortcut, except that it would allow the user to select from the list of queries and would display the results as a read-only table.
A Query field type is rather uncommon for a database.
I'd rather suggest adding a URL attribute type which would automatically display as hyperlink on a form. Using rules, you could then link a query and many other things, no ?