Database program with CSV import and ad-hoc SQL queries? Is there a database program for the Mac that makes it easy to import a CSV file into a table and then query and manipulate the data using ad-hoc SQL queries?

(A Windows example of a similar product would be Microsoft Access ... it also has forms and reports, which are not as important, but I would not mind a Mac solution that has those too.)
Filemaker Pro will be your best bet overall. It is easier to use than Access, and will give you what you want and more. It's going to be a learning curve with anything if you're used to Access, so just jump in to one of them.

Filemaker Pro - 

http://www.filemaker.com/products/filemaker-pro/

If you're wanting to do something SQL related though, then I'd check out the following: Sequelpro; Querious; Navicat; or MySQL Workbench.

Sequelpro is best out of all of these though, in my opinion, and it's completely free. Bam!

http://www.sequelpro.com/