Introduction to SQL
Structured Query Language, more commonly known as SQL, is the standard language used to communicate with relational databases. While it may seem complicated to understand at first, SQL plays an integral role in the world of data management, and its proficiency can help unlock a wide range of opportunities for professionals.
In today’s data-driven world, SQL is ubiquitous, and its use is expanding beyond just relational databases, making it a valuable skill to acquire. In this article, we will provide a brief overview of SQL, its importance, and the benefits of the LearnSQL.com SQL Basics course.
What is SQL? SQL (Structured Query Language) is the standard language used to manage and manipulate data stored within relational databases.
This query language forms the foundation of managing the vast amounts of data that are accumulated daily by organizations worldwide. SQL can be used to perform basic CRUD operations (create, read, update, delete) and execute more complex queries on databases.
SQL is designed to be simple and intuitive, and hence it became a popular tool for data manipulation and analysis.
Development and Current Applications of SQL
SQL came into being during the mid-1970s by Donald D. Chamberlin and Raymond F.
Boyce, while working at IBM. They developed the language to manage their existing databases, and by 1980, SQL had been standardized.
As technology advanced, SQL evolved to accommodate the increasing complexity of data management. Today, SQL is used in a wide range of applications beyond relational databases, such as Big Data and NoSQL systems.
Big Data refers to voluminous amounts of data that cannot be stored or analyzed using relational databases. Big Data technologies like Apache Hadoop, Apache Spark, and Apache Flink use SQL-like languages to process, store, and analyze data.
Similarly, NoSQL databases like MongoDB and Cassandra use languages similar
to SQL to access and manage data. These technologies supplemented traditional SQL-based solutions, and therefore proficiency in SQL becomes integral.
LearnSQL.com’s “SQL Basics” Course
The online course ‘SQL Basics,’ offered by LearnSQL.com, aims to provide a practical and interactive approach to learning SQL. The course is designed to start with the basics of SQL and move towards more complex concepts like aggregate functions and grouping data.
The course consists of 129 coding exercises, organized into eight sections, each covering specific SQL topics, making it one of the comprehensive courses available on the internet.
The Hands-on Nature of the Course
LearnSQL.com’s ‘SQL Basics’ course adopts a hands-on approach for learning. Students are required to write full answers to coding exercises instead of selecting predefined answers from multiple choices.
This practical methodology helps students understand the underlying concepts better and becomes more comfortable working with SQL syntax. The hands-on learning also encourages students to think through the code and understand the effects of every line of code.
Coding Exercises and Benefits of Typing the Full Answer
LearnSQL.com’s ‘SQL Basics’ course consists of interactive coding exercises. These exercises are designed to replicate business scenarios and provide a more practical understanding of SQL.
Coding exercises have a myriad of benefits, from reinforcing the learned material, improving retention, and allowing students to practice in a safe and interactive environment. Additionally, the requirement to type the full answer instead of selecting fixed answers helps build fluency in SQL and is a valuable skill when working with real-world SQL queries.
Use of Hints, Correct Answers, and Disqus for Assistance
When students face difficulties in answering the coding exercises or need hints, LearnSQL.com provides a built-in support system to help. Hints are given to help students understand the concepts better without providing the answer.
If students are still unable to answer the coding exercises, LearnSQL.com’s ‘SQL Basics’ course provides correct answers. These correct answers come with an explanation, allowing students to comprehend better, and this information helps students learn from their mistakes.
Additionally, LearnSQL.com has integrated Disqus, an online commenting system, to allow students to seek help from the instructors and other students.
Course Structure and Coverage of SQL Topics
The course consists of eight parts, each focusing on a specific SQL topic, and provides an in-depth understanding of SQL syntax and its applications. Part one introduces SQL using basic query statements, such as SELECT and FROM.
Part two includes filtering data using WHERE. Part three focuses on SQL functions, such as COUNT, SUM, and AVG.
Part four teaches students how to group data using GROUP BY. Part five shows students how to join tables using SQL JOIN.
Part six presents students to subqueries. Part seven includes SQL set operators, and part eight explains SQL normalization.
SQL is a vital skill for professionals in the data-driven world. Its importance continues to grow as organizations collect and process vast amounts of data.
LearnSQL.com’s ‘SQL Basics’ course offers a comprehensive and practical approach to learning SQL. Its hands-on teaching style, use of coding exercises and full answer typing, and built-in support system make it an effective tool for learning SQL.
By taking the ‘SQL Basics’ course, students will be on their way to understanding SQL syntax, mastering data analysis skills, and unlocking a vast range of opportunities. Who Should Take “SQL Basics”?
The LearnSQL.com ‘SQL Basics’ course is tailored to suit anyone looking to learn SQL, regardless of their professional background. This course is ideal for complete beginners, data analysts, and programmers looking to acquire SQL skills or to sharpen their existing skills.
For new SQL learners, the course starts with the basics and progresses towards more complex concepts, ensuring foundational knowledge acquisition, while for those already familiar with SQL, the course provides an opportunity to refresh their SQL knowledge and learn new skills.
Usefulness of the Course for Students Taking Database Courses
Students taking database courses can use LearnSQL.com’s ‘SQL Basics’ course to prepare and enhance their understanding of SQL, guaranteeing success in their studies. The course offers a pragmatic approach to learning SQL and complements the theoretical data modeling and schema design taught in database courses.
Furthermore, it offers real-world examples that make learning SQL more compelling and provides practical skills that students can apply in a professional setting. The History of “SQL Basics”
LearnSQL.com’s ‘SQL Basics’ course was initially created by Vertabelo Academy, a database training platform with a goal to promote their database modeling tool.
The course aimed to teach SQL skills while simultaneously introducing their database modeling tool, Vertabelo. It was advertised as a flexible course that could tailor to learners with different backgrounds and IT knowledge.
Early reviews of the course were immensely positive, with most learners citing the course’s high value and the ease with which they could apply the learned skills in a professional environment. The course quickly became popular and prompted its expansion to include additional courses like Advanced SQL, Window Functions, Recursive Queries, and custom SQL courses.
In 2020, LearnSQL.com launched SQL courses for data science and analysis. The new courses, like Python and SQL, R and SQL, and SQL and Tableau, are designed to address the needs of data scientists and analysts looking to expand their skills.
LearnSQL.com also developed and adapted SQL courses for ride-sharing giant Uber, providing them with the necessary SQL skills to handle operational data at large scale. The Uber courses focused on mastering SQL for data manipulation and analysis and taught learners how to use SQL to find driver metrics and allocations.
The LearnSQL.com ‘SQL Basics’ course is an interactive and practical online course designed to introduce SQL concepts and provide learners with a comprehensive foundation in SQL skills. It has a diverse target audience, ranging from complete beginners to seasoned programmers and professionals in the data science and analysis fields.
Early feedback and continued course expansion reflect the course’s value and reliability, making it an effective tool for learning SQL. In conclusion, SQL is the foundation of managing and manipulating data stored within relational databases, and its importance continues to grow as technology advances and organizations collect and process vast amounts of data.
LearnSQL.com’s “SQL Basics” course offers a practical and interactive approach to learning SQL, and its hands-on learning methodology, comprehensive course structure, and built-in support systems make it an effective tool for learning SQL. From beginners to seasoned programmers and data scientists, this course is designed to provide valuable skills and unlock tremendous opportunities in the data-driven world.
By taking this course, learners can hone their SQL skills, stay ahead of the curve, and succeed in their professional lives.