Express 是免费的，不需要许可费 如果您升级到常规（标准、企业等）SQL Server 版本，那么通常您会获得 Web 服务器的每 CPU 许可证
Express is free and does not require a license fee If you upgrade to a regular (Standard, Enterprise etc) SQL Server version then typically you get a per CPU license for a web server
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无论部署如何，SqlExpress 都是免费的，您只需要接受限制：
根据您的描述，我认为 SQLExpress 非常适合您的应用程序。
这是来自 MS http://www.microsoft.com 的参考/Sqlserver/2005/en/us/compare-features.aspx
SqlExpress is free no matter what the deployment, you just have to accept the limitations
Based on your description I think that the SQLExpress would work fine for your application.
Here's a reference from MS http://www.microsoft.com/Sqlserver/2005/en/us/compare-features.aspx
Express 是免费的，不需要许可费
如果您升级到常规（标准、企业等）SQL Server 版本，那么通常您会获得 Web 服务器的每 CPU 许可证
Express is free and does not require a license fee
If you upgrade to a regular (Standard, Enterprise etc) SQL Server version then typically you get a per CPU license for a web server
在您的场景中，SQL Server 通常需要许可证，即多路复用。
如果您要重新分发 Express，这意味着将其发送给在其计算机上安装它以使用您的插件的人，则您需要注册 (http://www.microsoft.com/sqlserver/2005/en/us/express-redistribute.aspx）。
如果您在某些服务器上安装了 Express，人们可以从网页访问该服务器，那么您就可以了，尽管您可能会遇到 1GB 内存限制的性能问题。
SQL Server typically requires a license in your scenario, which is multiplexing.
If you are redistributing Express, meaning sending it to people that install it on their machines to use your plugin, yuo need to register (http://www.microsoft.com/sqlserver/2005/en/us/express-redistribute.aspx).
If you have Express on some server that people hit from a web page, you are OK, though you might run into performance issues with the 1GB ram limit.