Quick local database saves and restores with postgres

I recently added this rake task to our project. It performs fast database saves and restores using another postgres database. This is a very handy rake task to have around if you need to quickly go back to a previous version of your database and the normal create/restore process is too slow (for instances, restoring using a scrubbed database backup hosted on S3)

Find the most popular capitalization of a word or phrase

Today, I needed to find the most popular capitalization of user entered product brands. Previously, I'd just used lowercase brands, something like this:

However, this was returning "whole foods" instead of "Whole Foods", which was considered more desirable.

Using window functions and common table expressions, this is what I came up with: