There are many resources for learning complete SQL. For beginners, a book on the subject is sufficient, but more advanced users can benefit from a more interactive course. Interactive courses provide real-world SQL queries and give learners the chance to test their knowledge. In addition, online courses also give students the opportunity to test their knowledge, allowing them to master the technique quickly and efficiently. The following are some resources for learning complete SQL.nData Analysis Using SQL and Excel by Gordon S. LinoffnThis Practical Guide to Data Analysis Using SQL and Excel shows how to conduct the most effective data mining techniques. It explains how to use Excel to develop a data mining model that will make sense of your data. The book covers the different methods of data mining, from the first-order method to the advanced one. This book also shows how to apply the results of your analyses to other datasets.nThis comprehensive text demonstrates how to extract business information from relational databases. It teaches how to define business dimensions, store transactions related to customers, and summarize important data. You won’t need to spend a lot of money on expensive data mining tools. You can perform advanced data analysis using simple and free tools. The authors explain how to conduct a variety of statistical analyses without using costly data mining tools.nThis practical guide to data mining teaches readers to use Excel to visualize the results. It also explains how to interpret data using simple concepts in statistics. Core analytic techniques are explained in detail as they run on real data. They include examples and the appropriate times to use each type of analysis. Lastly, the book explores the advanced applications of Excel and explains the most powerful ways to visualize the results.nThis resource is invaluable for data analysts from any industry. Although you should have a strong knowledge of SQL before starting the book, you may want to spend some extra time learning more about data analysis. The book includes several sample datasets and scripts to help you get started. This book is an excellent resource to learn data analysis using Excel and SQL. The book also includes a list of recommended secondary resources, so you can brush up on your statistics knowledge.nT-SQL by Bill KarwinnSQL is one of the most important languages to master, and applications that store data often use it. Unfortunately, most developers aren’t SQL experts, so the SQL they create is often inefficient, hard to maintain, or just plain wrong. But with Complete SQL with T-SQL by Bill Karwin, you can avoid making these mistakes! Karwin has helped thousands of developers create stronger relational databases by teaching them how to avoid common mistakes.nThis book is written for newbies and intermediate users alike. It includes practical examples and sample databases that allow readers to practice what they’ve just learned. It’s available in Kindle and paperback versions. Whether you’re interested in learning SQL or need to learn more about T-SQL, this book will get you on the right track. You’ll be able to use it to build complex databases and analyze data, whether it’s in a database or on a web server.nAnother excellent SQL book is Complete SQL with T-SQL by Alan Beaulieu. This hands-on book teaches you how to write reliable queries. It covers important aspects of SQL query writing, such as joining multiple tables, modifying sets of data, and performing complex calculations. While this book teaches the basics of SQL, you’ll find many examples of complex SQL queries, and exercises throughout.nWhile it covers all of the basic techniques of T-SQL, it’s also practical, with many real-world examples. The author breaks down each concept and style into practical situations, including database set up and sample data. The book includes 57 practical challenges and problems to help you become a better SQL developer. The book is a valuable addition to your reading list, so don’t wait to learn it!nWhile Complete SQL with T-SQL by William Karwin has a comprehensive coverage of the topic, beginners will probably want to start with a book on the basics. Faroult’s unconventional approach to SQL is a great way to ensure you’re creating the correct queries. Ultimately, the key is to get practiced on real data so that you can use it for practical purposes.nSQL Queries for Mere MortalsnDespite its name, SQL Queries for Mere Mortals is not a book for nerds. It is a hands-on, step-by-step guide to writing SQL queries for virtually any modern database. Written by database consultant Graham Mandeno, this book removes the enigma of writing complex queries. With hundreds of examples and clear explanations, this book will make writing SQL queries an easy process for even the most inexperienced users.nThe book starts with a query example about a cookery book. The query example is cleaned up to remove non-SQL words and converted to Null. Any extra words are crossed out. This method is used all throughout the book. Despite its obvious flaws, it is a useful guide when building queries. It also helps beginners to understand how SQL queries are structured. If you have any doubts about SQL, this book is a must-read!nSQL Practice Problems by Sun TzunThe Art of SQL: Mastering the Art of Database Design takes a page from the classic treatise by Sun Tzu, the master of war. Faroult’s approach to SQL takes the military tactic approach and argues that the safe, quick approach to database design is sweeping dirt under the carpet. Designed correctly, SQL code is a long-lasting solution that can survive major releases of database management systems and several generations of hardware. As with the Art of War, it requires a firm understanding of relational theory and fast, efficient code from the start.nThe book takes a different approach to SQL, not as a function manual, but rather as an essay about strategy. Instead of covering JOIN and WHERE, it emphasizes understanding the nature of SQL and how to apply it to your advantage. Advanced engineers should read this book to learn how to master the art of SQL. This book provides insight into the philosophy behind the database, its strengths and weaknesses, and the best ways to use it.nThe Art of SQL: The Art of SQL is a perfect book to read after The Art of SQL. It takes an even higher level of abstraction and emphasizes strategies for writing correct SQL. Sun Tzu’s The Art of War is referenced throughout, though the book makes minimal allusions. Ultimately, the goal is to help you become an expert in SQL. It’s an important book for both beginners and advanced users alike.nFree SQL classes aren’t the only option for new developers looking to master the language. There are also courses available through Stanford University, Greenspun, and Udemy. In addition, if you’re interested in learning more about Oracle SQL, you should check out the SQL Bootcamp at Stanford. Both of these courses will teach you the basics of the language. However, if you’re looking to master SQL with a more advanced approach, you’ll want to invest in a course from an institution that offers a recognized degree.nUdemynThe SQL Fundamentals course is very concise and covers the basics in a matter of two hours. You can complete the course in a matter of hours, and it covers CRUD queries as well as JOINS and UNIONS. The course also covers parallel testing and strategy. It also teaches you how to install Postgresql on Mac OS X. However, it could have covered more advanced topics like data science and machine learning.nIf you’d like to learn SQL for free, Udemy has a course that will help you achieve this goal. This course is free forever, but the instructor may decide to start charging when they reach certain promotional targets. That said, it’s well worth checking out the course first. The course offers extensive training on data analysis, making queries, and reading and writing complex database queries. The courses on Udemy are renowned for their accessibility and ease of use, making them an excellent choice for beginners.nThe course covers topics from a fundamental level to advanced concepts, with many hands-on exercises. You’ll get a thorough overview of key SQL concepts, including how to use join statements to analyze data. Each module includes plenty of real-world examples and challenges that will keep you interested in learning. Once you’ve completed the course, you’ll have a working knowledge of SQL and be able to use it to develop analytical solutions. The course includes more than one hundred hands-on examples, quizzes, challenges, and lifelong support. And a comprehensive recap document that includes all your learning is a great way to review your new skills.nGreenspunnThe Intro to Relational Databases course on Udemy offers video lessons for beginners and intermediate students. The course offers some coding exercises, but does not offer interactive coding tests. The SQL for Web Nerds course from MIT Professor Philip Greenspun is another good option. The course is a self-paced video course and offers a three-week Risk-Free Trial. This means that you can learn SQL without paying any money to get started.nAnother free resource is MIT Professor Philip Greenspun’s «SQL for Web Nerds.» This book explains relational database management systems (RDBMS) from the perspective of web application developers. It covers fundamental database concepts and provides practical examples of basic queries. Greenspun takes on topics like handling foreign data and Java executing in Oracle Server, as well as normalization.nThe SQLite lessons are self-paced and feature a video tutorial on the left side that shows the structure of a database and results from SQL queries. Exercises are accompanied by documentation and helpful hints. After the first part of the course, learners complete a more advanced project. The course is broken up into five parts, beginning with basic SQL concepts and progressing to advanced queries such as joins. It also features a «What to learn next» section that includes useful tips for further study.nThe other option for beginners is BloomTech. This online training offers self-paced tutorials and is highly interactive. In addition to online training, students can ask experts questions and get job hunting help. The course is free and includes real-world examples. The course includes reference materials, quizzes, and real-world examples. It is free to sign up for a free trial. You’ll receive a certificate of completion.nStanford UniversitynIf you’re looking for a free SQL course, you’re in luck! Stanford offers a database mini-course that covers SQL as it relates to relational database systems. This course is designed for intermediate-level programmers, but it requires some background knowledge in computer science. It also requires a course in relational algebra. Nevertheless, the material is well worth taking, and is ideal for anyone who is interested in learning more about SQL.nThe free Introduction to Relational Databases course is the first step in the process. This course covers fundamentals of relational databases, such as tables and constraints. The course also covers Python programming, including files and invoking APIs. Students should allow a week for the course to complete. The course is accredited, so a certificate is worth a lot, since it helps students land better jobs and make a good first impression on prospective employers.nWhile attending a free Stanford University computer science course is not the most cost-effective option, it is definitely worth a try. The course materials are available for free, and Stanford University also provides access to the material. For those who are interested in job opportunities, BloomTech’s SQL training is ideal. The program provides interactive learning and expert support. You’ll have the opportunity to ask questions and get answers from a real expert, plus BloomTech’s course offers job-hunting assistance.nOracle SQL BootcampnIf you’re considering learning Oracle SQL, you’ll be happy to hear that there are free online courses available. Udemy and Pluralsight are two of the leading online learning portals. These courses include the fundamentals of Oracle SQL, such as the SELECT and ALTER statements. They also offer hands-on experience writing SQL codes and include quizzes and examples to reinforce your learning.nIn addition to learning how to write a query, it can improve your job prospects. You can earn over $100k a year in the IT industry if you know how to use Oracle SQL. You will also benefit from the company’s support for SQL, which means you will learn how to make the software work for you. Oracle SQL is the database language that backs all Oracle products, including databases. A good SQL bootcamp will help you de-mystify the query process and provide you with the essential knowledge you need to write a query.nIn addition to free online classes, Udemy offers many free SQL courses. While some of these will eventually turn into paid courses when the instructor reaches their promotional targets, this course will always be free. You can take it when you have the time. And if you want to learn from the comfort of your home, you can take the course as a part-time job or study at home.nPostgreSQL TutorialnThere are many benefits to using a PostgreSQL tutorial as a beginner’s resource. PostgreSQL is an open source object-relational database management system that is widely used in various tech-related industries. This language provides a common language for data management, and is often used by experts in geospatial technology, data analysis, and web applications.nThe PostgreSQL Tutorial by Amigoscode is an excellent resource for those looking to learn the basics of SQL. It features more than sixty hours of video lectures that are divided into 49 lessons, totaling 627 lessons. You’ll learn everything from creating a database from scratch, to implementing complex SQL queries, to understanding database relationships. This course is free and includes a certificate of completion when you finish.nOne of the best ways to learn PostgreSQL for free is to take a course. You’ll need at least six to eight hours a day to learn the basics. You’ll need to devote about two to three months to master the language. If you have some experience in database management, you can start learning PostgreSQL in about two to three weeks.nAnother great resource is the SQL Cheatsheet on GitHub. This repository contains useful SQL queries for different types of data analysis. The tutorial explains how to use the SUM function to total the numerical values of a column, and how to alter and create tables in a database. Each lesson is followed by an interactive exercise, and the lessons build on each other. If you have experience with SQL, you can skip ahead using the links at the top of the page. If you’re still not confident with the language, you should still complete the lessons.nKahn AcademynKhan Academy’s free course will teach you the basics of SQL, including what is required for database queries and where to get the data. The lessons use video tutorials to help you understand each topic. The videos even come with challenges that will help you test your knowledge. You’ll be able to experiment with datasets as you learn. In addition to providing a free course, Khan Academy also offers paid courses in computer science, programming, and more.nKahn Academy is the best way to begin learning SQL for free. This video course is made by a professor at MIT, and it features exercises and simple examples for beginners and intermediates. It’s not an online course, so you won’t get the practical experience you need to make a living on the internet, but it’s a great resource if you’re planning on doing SQL work in the future.nLearning SQL is an important skill for a career in many areas. Some positions require knowledge of SQL, and it can be mastered within 3 to four months. It’s also a good first step into more advanced languages. If you know how a computer works, it’ll be easier to learn new languages. In addition to helping you build your career, learning SQL can help you understand how a computer thinks.