Domain-Driven SQL Tracks
Go beyond toy LeetCode problems. Learn SQL the way it is actually used in production by querying authentic enterprise data warehouses — modeled after SAP, Databricks, and Shopify schemas.
Enterprise Schemas
Multi-table models with realistic foreign keys, lookups, and audit trails.
Real Business KPIs
Calculate AOV, Sell-through, RFM, Cohort Retention, and FIFO COGS.
Fast DuckDB Sandbox
Instant local execution with Socratic AI Sensei hints when stuck.
Available & Upcoming Tracks
1 Track Active · 3 In DevelopmentEnterprise Retail & Supply Chain
Master real-world retail analytics across 8 enterprise tables — from POS retail invoices and DC warehouse stockouts to customer RFM segmentation, cohort retention, and FIFO inventory valuation.
FinTech & Ledger Engineering
Query double-entry ledgers, calculate multi-currency exchange reconciliations, detect real-time payment fraud velocities, and analyze BNPL credit risk aging curves.
AdTech & Attribution Analytics
Analyze programmatic ad auction logs, compute multi-touch attribution (First-Touch, Linear, Time-Decay), detect bot click-fraud rings, and optimize ROAS bids.
HealthTech & Clinical Informatics
Transform HIPAA-compliant electronic health records (EHR), track clinical trial patient cohort retention, analyze hospital readmission rates, and optimize ICU bed utilization.