A clean order CSV with a reconciled exclusion count
Excel Data Cleanup
Clean and reshape messy sales data for a reliable handoff.
Build a skill. Finish a useful task.
8 complete mini-courses with original practice data, checked outputs and files you can keep. Choose your deliverable and the time you have.
What do you need to deliver?
Choose a finished piece of work, then practice the steps to make it.
8 courses
Explore course
A regional sales CSV with checked counts and totals
Excel Sales Reporting
Build a checked sales report with lookups and conditional totals.
A SQL paid-order report with NULL and date checks
SQL Analyst Starter
Write and run SQL queries to answer everyday business questions.
A net-revenue report with a refund exception audit
SQL Operations Cases
Diagnose funnels, refunds, inventory and duplicate customer records.
An evidence-grounded pilot JSON and source manifest
AI Workplace Quality
Check AI-assisted work against evidence and a clear output contract.
A regional gross/refund/net ledger and exception SQL
Sales & Refund Reconciliation
Reconcile paid sales to posted refunds without duplicate-key or join inflation.
A pack-rounded replenishment CSV with recount and reservation exceptions
Inventory & Replenishment Exceptions
Turn stock snapshots and inbound orders into a checked replenishment queue.
An SLA review CSV with evidence IDs and ordered follow-up actions
Support SLA & Evidence Handoff
Check response deadlines and attach verifiable receipts to a support handoff.
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Three ways to practice
Edit CSV data in a spreadsheet, run SQLite queries or check AI output against fixed sources. Start with guided lessons, complete a project, then try its fresh dataset.