Stores a set of key/value pairs as strings Can be useful for semi structured data Useful for 'extra' data that isn't often queried CREATE EXTENSION *hstore*; CREATE TABLE users (hdoc *HSTORE*); INSERT INTO users VALUES(*'* "_id" => "derick@localhost", "email" => "derick@localhost", "fullname" => "Derick Rethans", "slug" => "derick-rethans", "created_at" => *1452546141*, "timezone" => "Europe/London", "confirmed" => *true*, "confirmed_at" => 1452546148, "location" => "London, UK", "count" => 16, "count_unique" => 13, "isAdmin" => true *'*);