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Function coalesce(column_1, column_2, ...) takes two or more arguments (columns or other values like strings, numbers) and return first non-NULL argument. Principle of work: check if first argument is NULL. if yes, go to the next step, otherwise return the argument
I've looked at 14 blogs and the top books in Goodreads and compiled a list of the most recommended books on sql. There's 31 books on the list, I copied the top 20 here. The full list is at https://www.readthistwice.com/lists/best-sql-books. SQL Cookbook by Anthony Molinaro. SQL Practice Problems by Sylvia Moestl Vasilik.
25 paź 2023 · Table of Contents. Why Should You Read SQL Books? The SQL Books You Should Read in 2024. 1. SQL QuickStart Guide: The Simplified Beginner's Guide to Managing, Analyzing, and Manipulating Data With SQL. 2. SQL All-in-One For Dummies. 3. Sams Teach Yourself SQL in 10 Minutes. 4. SQL: The Ultimate Beginners Guide: Learn SQL Today. 5.
1 maj 2023 · Some of the SQL books are available in PDF, .epub, and .mobi format as well. Some of the books are available for free to read online others you can download in PDF format.
6 kwi 2024 · Chapter 1-2: What are databases, why do they matter, and how do you get set up for hands-on learning with SQL? Chapter 3-6: Master the heart of SQL: the SELECT statement, advanced filtering with WHERE, joining multiple tables, and using set operators to combine results.
29 lip 2020 · Any of these books is definitely worth reading. 1. Getting Started with SQL: A Hands-On Approach for Beginners. Let's start with something for complete rookies. If you're just taking your first steps in SQL and don't even know what a JOIN or WHERE clause is, this book is for you.
Learning SQL eBook (PDF) Download this eBook for free. Chapters. Chapter 1: Getting started with SQL. Chapter 2: ALTER TABLE. Chapter 3: AND & OR Operators. Chapter 4: Cascading Delete. Chapter 5: CASE. Chapter 6: Clean Code in SQL.
