I am trying to create a DB Project in Visual Studio 2013. I have installed SSDT Version 12.0.50730 . But when creating the db project it says project type is not supported by this version of application.
I would recommend installing the latest update for Visual Studio 2013: https://www.visualstudio.com/en-us/news/vs2013-update5-vs.aspx
And then performing a re-install SSDT using SSDTSetup.exe: https://msdn.microsoft.com/library/mt204009.aspx