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Choose a database from the sidebar, write SQL in the editor, and click Run to see results. Click Review to get AI feedback. Drag the divider between editor and results to reshape your workspace. Export your query or results anytime using the toolbar buttons.
PixelMetrics is the fictional SaaS company at the center of Walter's LinkedIn Learning course. It includes four tables — customers, orders, products, and regions — with ~1,200 rows of realistic data built to cover every chapter. Practice directly against the queries from the course.
A forensic SQL database for analysts who want to push beyond the basics. Complex joins, subqueries, and aggregations drawn from investigative scenarios. Use it when you're ready to stress-test your SQL reasoning against real-world complexity.
The Review button sends your query and the full database schema to Walter AI, which returns personalized feedback: is the query correct, is the style clean, and what's the one thing to improve? Built to accelerate learning without replacing the thinking.
Walter Shields is a data analytics educator, best-selling author, and LinkedIn Learning instructor with over 500,000 learners across his courses — including Data Analysis: Investigate with SQL and SQL Essential Training, both rated 4.8 stars.
WSDA Learning is his independent platform — home to courses, tools, and the daily WSDA News newsletter read by 11,000+ data professionals. This SQL Editor is one of three free AI-powered tools built to help analysts get better at their craft. The others: PVC Practitioner for validating AI-generated analysis, and the AI-Enabled Data Analyst learning pathway at wsdalearning.ai.