SQL Course: Learn SQL from Beginner to Advanced (Udemy.com)

Learn SQL from beginner to advanced with a practical, step-by-step SQL course designed to help you write real SQL queries, analyze data, work with relational databases, and build confidence using SQL.

Whether you are completely new to SQL or want to strengthen your existing SQL skills, this course takes you from the fundamentals to advanced SQL techniques through hands-on examples, exercises, and real-world database scenarios.

You will learn how to write SQL queries using SELECT, WHERE, ORDER BY, GROUP BY, and HAVING, work with aggregate functions, combine data from multiple tables using JOINs, handle NULL values, use CASE expressions, write subqueries and Common Table Expressions (CTEs), and apply powerful SQL Window Functions.

You will also work with PostgreSQL and learn SQL concepts that transfer to other relational database systems, including MySQL and SQL Server.

By the end of this course, you will be able to write complex SQL queries, analyze relational data, generate reports, work with database objects, and apply SQL to data analysis, business intelligence, database management, and real-world data problems.

What You Will Learn

This SQL course provides a complete learning path from beginner to advanced SQL.

You will learn how to:

• Write SQL queries to retrieve data from relational databases.

• Select, filter, sort, and transform data.

• Work with SQL operators and expressions.

• Use aggregate functions such as COUNT, SUM, AVG, MIN, and MAX.

• Group and summarize data using GROUP BY and HAVING.

• Combine data from multiple tables using SQL JOINs.

• Work with INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• Handle NULL values using COALESCE and NULLIF.

• Use CASE expressions for conditional logic.

• Write and understand subqueries.

• Create Common Table Expressions (CTEs).

• Use advanced SQL Window Functions.

• Work with functions such as ROW_NUMBER, RANK, and DENSE_RANK.

• Analyze and transform data using SQL.

• Generate useful reports from relational databases.

• Work with PostgreSQL.

• Understand SQL concepts applicable to MySQL and SQL Server.

• Work with database design and relational database concepts.

• Apply SQL to practical data-analysis problems.

Beginner to Advanced SQL

The course follows a step-by-step approach.

You will begin with the fundamentals of SQL and relational databases before progressing into more advanced SQL queries and data-analysis techniques.

Topics include SQL syntax, SELECT statements, filtering, sorting, expressions, functions, NULL values, grouping, aggregate functions, JOINs, subqueries, CTEs, Window Functions, conditional logic, regular expressions, and advanced grouping techniques.

SQL for Data Analysis

SQL is one of the most important tools for working with structured data.

Throughout the course, you will learn how to use SQL to retrieve, filter, transform, aggregate, and analyze data. These skills can be applied to data analysis, reporting, business intelligence, database programming, and many other data-related roles.

PostgreSQL, MySQL and SQL Server

The course uses PostgreSQL as an important practical database environment while teaching SQL concepts that are transferable to other relational database management systems.

You will also learn concepts relevant to MySQL and SQL Server, giving you a broader understanding of SQL across different database platforms.

Advanced SQL

As you progress through the course, you will work with advanced SQL features including:

• Common Table Expressions (CTEs)

• SQL JOINs

• Subqueries

• Window Functions

• ROW_NUMBER

• RANK

• DENSE_RANK

• CASE expressions

• NULL handling

• Regular expressions

• ROLLUP

• CUBE

• GROUPING

• GROUPING SETS

These techniques allow you to solve increasingly complex SQL and data-analysis problems.

Practical SQL Skills

This is a hands-on SQL course.

Rather than learning SQL only as theory, you will work through practical examples and progressively more advanced SQL queries.

The goal is to help you understand not only how SQL syntax works, but also how to use SQL to solve real-world database and data-analysis problems.

Who Is This Course For?

This course is suitable for:

• Complete beginners who want to learn SQL.

• Students looking for a comprehensive SQL course.

• Developers who need SQL and database skills.

• Data analysts learning SQL for data analysis.

• Students preparing to work with relational databases.

• Professionals who want to strengthen their SQL skills.

• Learners who want to progress from beginner SQL to advanced SQL.

• Anyone who wants practical experience writing SQL queries.

Updated for 2026

This course is regularly updated with current examples, practical exercises, and modern SQL learning content.