Run the installer and navigate to the screen. Check the box for SQL Server Data Tools .
If you install SSDT but don't see "SQL Server Database Project" in Visual Studio, run the installer again and select "Repair." If you'd like, I can help you: Find the to the Visual Studio 2010 SP1 update. Compare SSDT 2010 features with modern Azure Data Studio . sql server data tools 2010 download new