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Exercises

High-Value Orders ReportEasyPromotion-Eligible ProductsEasyGmail Customers for Migration NoticeEasyPremium Catalog by PriceEasyRecent Activity WidgetEasyAt-Risk Premium CustomersEasyFiltered Product CatalogEasy
Count Orders and Unique CustomersEasyMonthly Revenue and Average Order ValueEasyCheapest and Most Expensive Products by CategoryEasyRevenue Breakdown by Product CategoryEasyOrder Counts by Country and MonthEasyPremium Supplier Program CategoriesEasyHigh-Volume Categories Excluding Small OrdersEasy
Shipping Labels with Customer NamesEasyTotal Spend per CustomerEasyCustomer Order Count Including InactiveEasyFind Products Never OrderedEasyPremium Customer Recent OrdersEasyAverage Order Value by Product CategoryEasyCustomer Summary ReportEasy
Flag Products Missing DescriptionsEasyClean Up NULL Categories for ReportingEasyClassify Orders by Shipping TierEasyMonthly Order Size DistributionEasyCustomer Health Score ClassificationEasy
Comprehensive Order ReportMediumEmployee-Manager DirectoryMediumRevenue Breakdown by Product CategoryMediumFind Missing Products in StoresMediumSame-Category Price ComparisonsMediumTop Performers Across DepartmentsMediumE-commerce Executive Summary PipelineMedium
High-Value Invoices Above AverageMediumMost Recent Order per CustomerMediumMonthly Revenue by Plan TierMediumCustomer Segmentation for MarketingMediumProducts Never OrderedMediumMonth-over-Month Revenue GrowthMediumSaaS KPI Dashboard PipelineMediumEmployee HierarchyHardDate Series GenerationMedium
Top N Per GroupMedium
Year-over-Year GrowthHard
Find Inactive CustomersEasy
I6 — Date & String FunctionsComing Soon
I7 — Conditional AggregationComing Soon
Running Total & Moving AverageMedium
Login Streaks (Gap & Island)HardConsecutive Active DaysMedium
Cohort Retention AnalysisHard
Funnel AnalysisHard
A5 — Revenue Metrics (MRR/LTV)Coming Soon
A6 — PIVOT / UNPIVOTComing Soon
A7 — DuckDB Modern SQLComing Soon
A8 — Advanced Business ScenariosComing Soon