机器上之前安装了sql server 2008，由于要升级ETL，需要安装SSDT2017.
安装包可以在这里下载：https://docs.microsoft.com/en-us/sql/ssdt/download-sql-server-data-tools-ssdt?view=sql-server-ver15
安装过程中遇到问题，安装失败，查看日志，提示：'Seems you have installed a previous version of SSAS or SSRS extension that is incompatible with the version to be installed, you may need to uninstall both of them before continuing the setup, or current installation may fail. Do you want to continue anyway?'
因为之前安装sql 2008的时候可能勾选了SSRS SSAS的选项，和现在的安装版本不兼容。
解决方案：
控制面板卸载microsoft SQL server 2008程序支持文件（简体中文）
然后重新安装即可。
