Hello Sir,
I have 10+ years of experience in software development, please have look at the projects/certifications that I have completed here and the feedback/rating I got, which proves that I am a genuine developer.
I would like to work on this project, I understand your requirement very well and can do it easily as per your expectations.
I will do this as C# Windows application where you need to select the source folder, source file and the table name. Application will check if the table exists in the required file, if not then do the union of data from all files and create table in selected file. Let me know if that works for you.
I am expert in ASP.Net, C#, VB.Net, AngularJS, javascript/jquery, css, html so not to worry about anything.
Let me know if you are interested so that we can discuss in more detail.
Thanks,
Ninad