| Common Bad Practice | Ben-Gan’s Correction | |---------------------|----------------------| | SELECT * | Explicit column lists only. | | WHERE col = NULL | Use IS NULL . | | Sorting on calculated column without alias | Use ORDER BY expression or alias. | | LEFT JOIN then WHERE right.col = 5 | Moves filter to ON clause. | | IN (SELECT ...) with NULL s | Use EXISTS . | | Row-by-row loops in stored procedures | Set-based UPDATE or window functions. |
DECLARE @MyInt INT = 10;
The concepts apply to modern environments, including SQL Server 2022 , Azure SQL Database , and Azure SQL Managed Instance . itzik ben-gan t-sql fundamentals
If you only buy one SQL Server book, make it T-SQL Fundamentals . Read it with SQL Server Management Studio open. Type every query. Break things intentionally. After finishing chapter 7 (window functions), you will write queries that previously required complex self-joins or cursors in three lines of code.
by Itzik Ben-Gan is widely considered the definitive starting point for anyone serious about mastering Microsoft SQL Server. Unlike many technical guides that focus solely on syntax, Ben-Gan’s approach emphasizes the logic and mathematical roots of the language, helping learners "think in sets" rather than just writing lines of code. The Core Philosophy: Thinking in Sets | Common Bad Practice | Ben-Gan’s Correction |
"Itzik Ben-Gan - T-SQL Fundamentals" is an excellent resource for anyone looking to learn T-SQL programming, from beginners to experienced developers. The book provides a comprehensive introduction to the language, covering the basics, best practices, and performance considerations. With this book, readers will gain a solid understanding of T-SQL and be able to write efficient, effective, and maintainable code.
It bridges the gap between basic queries and advanced programmable objects like stored procedures, triggers, and transactions. | | LEFT JOIN then WHERE right
Transact-SQL (T-SQL) is the language used to interact with Microsoft SQL Server databases. Understanding T-SQL fundamentals is crucial for any database professional or developer working with SQL Server. Itzik Ben-Gan, a renowned expert in T-SQL, has written extensively on the subject. In this blog post, we'll explore the key concepts and best practices in T-SQL, drawing inspiration from Itzik Ben-Gan's work.
Mastering T-SQL fundamentals is essential for working with Microsoft SQL Server databases. By following the guidelines and best practices outlined in this post, inspired by Itzik Ben-Gan's work, you'll be well on your way to becoming proficient in T-SQL. Remember to practice and experiment with different scenarios to solidify your understanding.
His book, now in its , covers these foundational principles across several key domains: