点击这里下载Sql Server 2008 R2 Express 注意操作系统是32位还是64位
SQL Server 2008 R2 SP2 Express下载地址
32位:https://download.microsoft.com/download/9/4/8/948966AB-52CA-40F1-8051-0216481065E6/SQLEXPRWT_x86_CHS.exe
64位:https://download.microsoft.com/download/9/4/8/948966AB-52CA-40F1-8051-0216481065E6/SQLEXPRWT_x64_CHS.exe