Excel Data Cleanup
Clean and reshape messy sales data for a reliable handoff.
Build a skill, one task at a time.
Five complete mini-courses with original practice data. Choose a tool, a level and a work goal.
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4 lessons · 9 tasksStart course
Excel Sales Reporting
Build a checked sales report with lookups and conditional totals.
SQL Analyst Starter
Write and run SQL queries to answer everyday business questions.
SQL Operations Cases
Diagnose funnels, refunds, inventory and duplicate customer records.
AI Workplace Quality
Check AI-assisted work against evidence and a clear output contract.
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Three ways to practice
Edit a spreadsheet, run SQLite queries, or check AI output against fixed sources. Each editor gives a score and a clear explanation.