How to select all duplicate records from a table

Suthahar Jegatheesan is Mobile and Cloud Specialist/Architect and he has 15+ years of IT experience as a Technology Consultant /Programmer/Developer in IT industry. Suthahar is an industry luminary focused on AI, Computer Vision, Bot, Machine Learning, UWP, Azure, Xamarin and Web Emerging User Experiences as subject matter expert (SME) in implementation, architecture, development and administration.