Itzik Ben-gan T-sql Fundamentals -

The curriculum moves from theoretical roots to practical, professional-grade techniques:

If you want to stop writing "spaghetti SQL" and start writing elegant, efficient code, this is the roadmap. itzik ben-gan t-sql fundamentals

WITH cte AS ( SELECT empid, YEAR(orderdate) AS orderyear FROM orders ) SELECT * FROM cte WHERE orderyear = 2020; The curriculum moves from theoretical roots to practical,

: It provides a solid foundation in relational theory and set theory, which is essential for writing efficient code. itzik ben-gan t-sql fundamentals

(a key strength of the book)