It can be tedious but this method works:
Export the data from T-SQL (probably as a JSON) or directly use the database from .Net application.
Now create a word template with some graphs (Line/Bar/Pie Chart or whatever) and bookmark it with some name 'my_chart'
Now include
Microsoft.Office.Interop.Word
&Microsoft.Office.Interop.Excel
references in your C# project. (Google it & see this also)Now in your C# project access those Graphs in word file using bookmark name & populate it with Data from database. (See this)
It may take some time but if your requirement is worth it you can do this. Also you don't need to study C#(it's very similar to Java) for this, just see interop C# syntax as you keep going BUT if you want see C# documentation for any reference.
Refer this tutorial also.