SQL ET POSTGRE 1 : Introduction

Welcome to this course on SQL and PostgreSQL for beginners. So why learn SQL? SQL is one of the most in-demand technical skills today. It is essential as soon as you need to work with data — saving, manipulating and linking records together. SQL sits at the top of the list of programming jobs, ahead of C#, JavaScript and even Java, and in the modern world of Big Data the demand for SQL will only keep growing.

Why PostgreSQL?

PostgreSQL is the most advanced open-source and adaptable relational database. It is one of the most popular and widely used database systems, trusted by companies such as Netflix, Spotify and Instagram. We will use PostgreSQL throughout this training, but the SQL language you will learn can be applied to any other database system such as Oracle or MySQL.
  • Create your own database from scratch.
  • Write complex SQL queries using joins and subqueries.
  • Understand advanced database concepts such as relations.
  • Carry out data analysis using SQL.
  • Add this skill to your CV with full legitimacy.
By the end of this course, you will be able to design a relational database, write rich queries and analyse data with confidence. Let's get started.

Summary

This introductory lesson presents SQL and PostgreSQL as essential skills for modern programming, with SQL ranking above JavaScript and Java in job market demand. PostgreSQL is highlighted as the most advanced and widely-used open-source relational database, trusted by major companies including Netflix, Apple, Spotify, and Instagram. By course completion, students will master database creation, complex SQL queries with joins and subqueries, database relationships, and real-world data analysis, making them job-ready with credible qualifications.

Key points

  • SQL is one of the most demanded technical skills, ranking higher than JavaScript and Java, with increasing demand in the big data era
  • PostgreSQL is the most advanced, popular, and widely-used open-source relational database system, used by Netflix, Apple, Spotify, and Instagram
  • SQL skills are universally transferable across all database systems (Oracle, MySQL, PostgreSQL, etc.)
  • Course covers database creation from scratch, complex SQL queries with joins and subqueries, database relationship concepts, and practical data analysis
  • Completed skills provide legitimate qualifications for CV and career advancement in data-driven roles

FAQ

Why is SQL such a demanded skill?

SQL ranks among the highest demanded technical skills in programming, even above JavaScript and Java. In the modern era of big data, organizations increasingly need professionals who can manipulate, store, and analyze data efficiently, making SQL expertise critical for career advancement.

Why focus on PostgreSQL when other databases exist?

PostgreSQL is the most advanced and widely-used open-source relational database system. It powers infrastructure at major companies like Netflix, Apple, Spotify, and Instagram, making it industry-relevant and a safe choice for learning that translates across all database platforms.

Are SQL skills transferable to other databases?

Yes. While this course uses PostgreSQL, the SQL language and concepts you master are directly applicable to any relational database system, including Oracle, MySQL, and others, providing long-term career flexibility.