I'm deploying a web application into a server (hosting company). The application uses Sql Server 2008 Express Edition as its database. It seems from the license agreement that this state is ok, as Microsoft says:
"All editions of SQL Server Express are free downloads that can be redistributed subject to agreement. Each edition can function both as the client database and as a basic server database. Any edition of SQL Server Express is an ideal choice for independent software vendors (ISVs), server users, non-professional developers, Web developers, Web site hosts, and hobbyists who are building client applications... "
I didn't see any explicit reference on that case. Do you have any experience with that issue? Is there any license problem with that?
No, no licensing problems at all - SQL Server 2008 Express is FREE to use, to deploy, to install - and can be used for any kind of hobbyist or commercial application - no restrictions.
来源：https://stackoverflow.com/questions/2320954/sql-server-2008-express-edition-licensing