VS2017 企業版安裝好了后，找不到 SSIS. 原來在VS2017的安裝包里沒有 Integration Services。需要單獨下載安裝的，詳見下面官方說明：
https://docs.microsoft.com/en-us/sql/ssdt/download-sql-server-data-tools-ssdt?view=sql-server-2017
Install Analysis Services, Integration Services, and Reporting Services tools
To install AS, IS, and RS project support, run the SSDT standalone installer.
不僅是Integration Services, Analysis Services, and Reporting Services tools也沒有在VS2017安裝包里的。
整理了離線版的SSDT安裝包：