It sounds like you're looking for the book T-SQL Fundamentals (3rd Edition) by Itzik Ben-Gan, specifically in PDF format via GitHub.
Do not skip the "Background to T-SQL" and "Logical Query Processing" chapters. They are the most important pages in the book. tsql fundamentals 3rd edition pdf github work
GitHub serves two critical functions for readers of T-SQL Fundamentals . First, it hosts the official and community-contributed source code required to build the sample databases, such as , which the book uses for all its demonstrations. Second, many developers use GitHub as a portfolio to document their progress, uploading their personal solutions to the book's challenging end-of-chapter exercises. It sounds like you're looking for the book