https://www.microsoft.com/zh-cn/sql-server/sql-server-editions-express
https://docs.microsoft.com/zh-cn/sql/ssms/download-sql-server-management-studio-ssms?redirectedfrom=MSDN&view=sql-server-2017
Microsoft SQL Server 2017 Express and Management Studio Express
原文：https://www.cnblogs.com/hofmann/p/11638371.html
