Windows Phone "Mango" includes a lot of cool, exciting new features that users will be showing to all of their friends. Of course, there are some features so behind the scenes that users will never really be aware of them—but developers will. One such new feature is the addition of "SQL Compact" to the Windows Phone Platform. In this episode of The Knowledge Chamber, my guest is Sean McKenna from the Windows Phone Platform team. Sean shows us SQL Compact in action on the phone and discusses how it provides a better way for data driven applications to access their information stores. Here are some links to additional information: Local Database for Windows PhoneThis is the starting point in the MSDN Developer Library for the various topics that cover database development on Windows Phone "Mango." Local Database Overview for Windows PhoneA quick introduction to the architecture and usage of SQL Compact and Linq To SQL for Windows Phone "Mango" application developers. LINQ to SQL Support for Windows PhoneA quick overview of the features that LINQ to SQL on Windows Phone supports. How to: Create a Local Database Application for Windows PhoneThis coding demo shows how to create a single-page to-do list application using SQL Compact. How to: Create a Local Database Application with MVVM for Windows PhoneThis coding demo shows how to create a multi-page to-do list application that relies on SQL Compact for a local database using the "Model-View-ViewModel" pattern.