Turn complex business logic into readable SQL.
Move beyond basic queries with conditional logic, NULL-safe transformations, subqueries, CTEs, and analytical window functions.
What you will leave with
You finish able to structure advanced analytical queries that another data professional can read, test, and maintain.
What you will be able to do
The curriculum is organized around these 4 practical outcomes.
Express business rules with CASE and NULL-safe logic
Clean and transform dates, text, and numeric values
Choose between subqueries and CTEs for multi-step work
Use window functions for rankings and running calculations
Course map
Curriculum
Open a module to inspect every section before you start. Your progress follows you through the course.
CASE WHEN - SQL's If-Then-Else, CASE for Conditional Aggregation, COALESCE - Your NULL Safety Net, and more.
String Functions - Text Manipulation, Date & Time Functions, Numeric Functions, and more.
Subqueries in WHERE, Correlated Subqueries, EXISTS & NOT EXISTS, and more.
Introduction to Window Functions, Ranking Functions: ROW_NUMBER, RANK, DENSE_RANK, PARTITION BY - Windows Within Windows, and more.
Who this course is for
Start with the background you have. The prerequisite notes above tell you exactly what is assumed.
Analysts who already write basic SQL
Data professionals preparing for advanced SQL interviews
Engineers maintaining reporting logic
Continue learning
Each course stands on its own. Pick the one closest to the next task you need to handle.
Master SQL analytics without collapsing rows.
Write useful SQL from your first lesson.
Turn messy tables into trustworthy analysis.
Start the course
Module 1 introduces the language and example used throughout the rest of the course.
