Can I use free SQLServer Express in commercial app

Question

Can I use free SQLServer Express in my commercial windows project? Are there any license issues? How many nodes it supports in multiuser environment ?

Answer 1

Quick answer is Yes. I have heard of MS themselves say it is OK. See this MSDN forums thread.

Answer 2

SQL Server Express is distributed for free and can be used reliably in any small business application.

The Wikipedia article is quite good at highlighting the key drawbacks of using an Express edition compared to a commercial SQL Server instance. Most notable perhaps is the lack of a SQL Server Agent process, which is usually used for job scheduling.