Turn complex business logic into readable SQL.
Move beyond basic queries with conditional logic, NULL-safe transformations, subqueries, CTEs, and analytical window functions.
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
Business reporting problems that progress from row-level rules to multi-step analytical queries.
Comfort with SELECT, WHERE, GROUP BY, and JOINs. SQL Fundamentals covers that base.
Open any module to review its exact sections. Progress and completion follow you through the course.
Topics include CASE WHEN - SQL's If-Then-Else, CASE for Conditional Aggregation, COALESCE - Your NULL Safety Net, and more.
Topics include String Functions - Text Manipulation, Date & Time Functions, Numeric Functions, and more.
Topics include Subqueries in WHERE, Correlated Subqueries, EXISTS & NOT EXISTS, and more.
Topics include Introduction to Window Functions, Ranking Functions: ROW_NUMBER, RANK, DENSE_RANK, PARTITION BY - Windows Within Windows, and more.
Analysts who already write basic SQL
Data professionals preparing for advanced SQL interviews
Engineers maintaining reporting logic
These are independent LDS courses that extend the closest skills. Choose the direction that matches what you want to build next.
Master SQL analytics without collapsing rows.
Write useful SQL from your first lesson.
Turn messy tables into trustworthy analysis.
The first module establishes the language and example used throughout the rest of the course.
