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SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now »
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. Chapter 7: Comments. Chapter 8: Common Table Expressions. Chapter 9: CREATE Database. Chapter 10: CREATE FUNCTION.
Online Tutorials: SQL tutorials on websites like W3Schools, SQLZoo, and Mode Analytics. Video Courses : Online platforms like Udemy, Coursera, and Pluralsight offer SQL courses for beginners. Interactive Websites : SQLFiddle, HackerRank, and LeetCode provide interactive SQL challenges and exercises.
5 wrz 2023 · SQL Functions. At the end of the day, SQL is a programming language, and it's one that supports functions. We can use functions and aliases to calculate new columns in a query. This is similar to how you might use formulas in Excel. IIF function. In SQLite, the IIF function works like a ternary. For example:
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. Unlike many other...
Let's Get Started Week 1 introduces SQL from a historical and theoretical perspective. The first statement you learn about is the SELECT statement, which enables you to retrieve data from the database based on various user-specified options. Also during Week 1 you study SQL functions, query joins, and SQL subqueries (a query within a query).
Learn how to interact with a SQL database from within your JavaScript programs! With Codecademy's specially crafted SQL courses & tutorials, learn how to manage large datasets and analyze real data using the standard data management language.
