You’ve been working with Microsoft SQL Server for yeeears, and you’re pretty confident that you know how to write a query.
So when I tell you about a book called T-SQL Fundamentals, you’re all, “nah, man, I got this covered.”
You are incorrect.
Sure, the first 5 chapters of the book are about 1-2 table queries, CTEs, subqueries, etc, and you’ve probably got that stuff down cold. But here’s where chapter 6 and 7 go:
UNION, INTERSECT, EXCEPT Windowing functions Pivoting data GROUPING SETS, ROLLUP
And subsequent chapters only get more detailed from there: how to properly modify data with