Analyze monthly sales and track performance trends in this hands-on data drill. Group transactions by store and month, then calculate month-over-month changes to uncover key insights.

Flatten a nested JSON column into individual rows in this intermediate data drill. Transform order records with embedded line items into a flat table format, then calculate total online sales. Ideal for practicing data transformation and aggregation skills.

Build reporting hierarchies, count direct and total reports, and map employee-manager relationships using organizational data. Ideal for practicing recursive logic and data modeling skills.