SQL Server 2008 Express Edition is a fantastic option for those seeking the power of a full-featured relational database but with low performance requirements. It replaces the Microsoft Data Engine (MSDE) as the free version of SQL Server for application development and lightweight use. It remains free and retains the limitations of MSDE with respect to client connections and performance. It’s a great tool for developing and testing applications and extremely small implementations, but that’s about as far as you can run with it. SQL Server 2008 Express has the following features and limitations:

If you’re able to live within those limitations, SQL Server 2008 Express may be the best choice for you. It’s available for free download from the Microsoft website.
Another option for database developers is SQL Server 2008 Developer Edition. Unlike Express Edition, Developer Edition has no limitations on database size, performance characteristics or functionality. However, it’s only licensed for use by a single developer in a non-production development environment. Translated: you may use it for your own use in developing applications, but you may not allow others to access either the database or those applications. Before you put the applications into production, you must transfer the database to a fully licensed version of SQL Server.

 

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