# SQL > SQL: 3 free modules that walk you through SQL: Build a Monthly Revenue Report from an Orders Table, SQL: Top Customers and Key Accounts with GROUP BY and… Source: https://learn.ynteractive.com/content/course/sql · Updated 2026-10-24 · Free from Stepthrough (https://learn.ynteractive.com) Updated October 24, 2026 SQL: 3 free modules that walk you through SQL: Build a Monthly Revenue Report from an Orders Table, SQL: Top Customers and Key Accounts with GROUP BY and HAVING and SQL: Find Customers Who Have Gone Quiet with a LEFT JOIN, using DB Fiddle. Each module is a real project. You watch a step, do it yourself in a practice copy of the tool, and it checks your work before moving on. It is free, and no experience is needed. ## 3 modules - [SQL: Build a Monthly Revenue Report from an Orders Table](https://learn.ynteractive.com/content/sql-monthly-revenue-report): A beginner SQL walkthrough in the free DB Fiddle: type a small orders table, then filter it, total it and turn it into revenue by month with GROUP BY, typing every line… - [SQL: Top Customers and Key Accounts with GROUP BY and HAVING](https://learn.ynteractive.com/content/sql-top-customers): A beginner SQL walkthrough in the free DB Fiddle: total revenue per customer with GROUP BY, sort the biggest to the top, keep the top three with LIMIT and list key… - [SQL: Find Customers Who Have Gone Quiet with a LEFT JOIN](https://learn.ynteractive.com/content/sql-quiet-customers): A beginner SQL walkthrough in the free DB Fiddle: join a customers table to orders, see why a plain JOIN hides customers who never ordered, and list every quiet account… ## What you do in each module - [SQL: Build a Monthly Revenue Report from an Orders Table](https://learn.ynteractive.com/content/sql-monthly-revenue-report) (about 12 minutes, 14 steps, beginner). You work through: Make the orders table, Ask your first questions and Revenue by month. - [SQL: Top Customers and Key Accounts with GROUP BY and HAVING](https://learn.ynteractive.com/content/sql-top-customers) (about 12 minutes, 14 steps, beginner). You work through: Make the orders table, Total each customer and Key accounts with HAVING. - [SQL: Find Customers Who Have Gone Quiet with a LEFT JOIN](https://learn.ynteractive.com/content/sql-quiet-customers) (about 15 minutes, 17 steps, beginner). You work through: Make two tables, Join them and Find the quiet accounts. ## Common questions ### How long will this take? The 3 modules take about 39 minutes in total, and you can do them in separate sittings. ### Do I need experience first? No. These modules are beginner level, and each step tells you exactly where to click. ### Do I need a DB Fiddle account to start? No. The practice runs in a copy of DB Fiddle inside your browser, and nothing touches your real accounts. When you are ready, you repeat the steps in your own account. ### Is it free? Yes. All 3 modules are free. ### Where should I start? Start with [SQL: Build a Monthly Revenue Report from an Orders Table](https://learn.ynteractive.com/content/sql-monthly-revenue-report), then continue with [SQL: Top Customers and Key Accounts with GROUP BY and HAVING](https://learn.ynteractive.com/content/sql-top-customers). ## Related [AI Automation for Beginners (3)](https://learn.ynteractive.com/content/course/ai-automation-for-beginners) · [Business Automations (11)](https://learn.ynteractive.com/content/course/business-automations) · [Prompt Writing (8)](https://learn.ynteractive.com/content/course/prompt-writing) · [AI for Accounting & Bookkeeping Firms (12)](https://learn.ynteractive.com/content/industry/accounting-and-bookkeeping-firms) · [AI for Law Firms (6)](https://learn.ynteractive.com/content/industry/law-firms) · [AI for Insurance Agencies (5)](https://learn.ynteractive.com/content/industry/insurance-agencies) · [AI for Recruiting & HR (10)](https://learn.ynteractive.com/content/industry/recruiting-and-hr) · [AI for Consulting & Agencies (17)](https://learn.ynteractive.com/content/industry/consulting-and-agencies) · [AI for Real Estate (4)](https://learn.ynteractive.com/content/industry/real-estate) · [AI for Sales (13)](https://learn.ynteractive.com/content/industry/sales) · [AI for Marketing (19)](https://learn.ynteractive.com/content/industry/marketing) · [AI for Operations (24)](https://learn.ynteractive.com/content/industry/operations) · [AI for Finance (4)](https://learn.ynteractive.com/content/industry/finance) · [Accounting (3)](https://learn.ynteractive.com/content/course/accounting) · [AI Basics (22)](https://learn.ynteractive.com/content/course/ai-basics) · [AI Voice Agents (5)](https://learn.ynteractive.com/content/course/ai-voice-agents) · [Build Apps with Lovable (5)](https://learn.ynteractive.com/content/course/build-apps-with-lovable) · [ChatGPT for Everyday Work (17)](https://learn.ynteractive.com/content/course/chatgpt-for-everyday-work) · [Claude for Everyday Work (7)](https://learn.ynteractive.com/content/course/claude-for-everyday-work) · [Claude Skills (6)](https://learn.ynteractive.com/content/course/claude-skills) · [AI for Marketing (2)](https://learn.ynteractive.com/content/industry/marketing) · [Gemini for Google Workspace (6)](https://learn.ynteractive.com/content/course/gemini-for-google-workspace) · [JavaScript (3)](https://learn.ynteractive.com/content/course/javascript) · [Jump Start: Runable (2)](https://learn.ynteractive.com/content/course/jump-start-runable) · [Make.com Automation Basics (5)](https://learn.ynteractive.com/content/course/make-com-automation-basics) · [Microsoft 365 (3)](https://learn.ynteractive.com/content/course/microsoft-365) · [n8n Automation Toolkit (25)](https://learn.ynteractive.com/content/course/n8n-automation-toolkit) · [Project management (4)](https://learn.ynteractive.com/content/course/project-management) · [Python (3)](https://learn.ynteractive.com/content/course/python) · [RAG: chat with your own docs (2)](https://learn.ynteractive.com/content/course/rag-chat-with-your-own-docs) · [Runable for Entrepreneurs (3)](https://learn.ynteractive.com/content/course/runable-for-entrepreneurs) · [Vibe Coding for Business (3)](https://learn.ynteractive.com/content/course/vibe-coding-for-business) · [Zapier Automation Basics (2)](https://learn.ynteractive.com/content/course/zapier-automation-basics) · [AI for Electrical (2)](https://learn.ynteractive.com/content/industry/electrical) · [AI for HVAC (2)](https://learn.ynteractive.com/content/industry/hvac) · [AI for Plumbing (2)](https://learn.ynteractive.com/content/industry/plumbing) · [DB Fiddle tutorials (3)](https://learn.ynteractive.com/content/tool/db-fiddle) [All free tutorials](https://learn.ynteractive.com/content) ## How every module works Each step is shown on the left, with a cursor pointing to exactly where to click. You do the same thing on the right, in a practice copy of the real tool. Get it right and it moves on. Nothing touches your real accounts until you're ready to build it for real. [Start learning free](https://learn.ynteractive.com/)