Dataset library
Realistic databases to practise on
Every dataset is fictional and generated from code, so it contains no real people or companies. Each is built to behave like real business data, including the problems that make naive queries wrong. Versioned, documented and validated: every rule listed under “What to watch for” is checked automatically on every build.
- Starter shopFree in the playgroundCorner Market (fictional)A small online shop with a handful of customers, products and orders.3 tables · 46 rows · version 2
- Wadi Market online storeFree in the playgroundWadi Market (fictional)Wadi Market is a fictional online retailer based in Riyadh that sells electronics, home goods, fashion and gourmet food across Saudi Arabia through its website, its mobile app and a third-party marketplace. You have a copy of its operational database for 2023–2025.8 tables · 35,996 rows · version 1
- Rawabi Bank Members playgroundRawabi Bank (fictional)A Saudi retail bank's branches, customers, accounts and two years of account transactions (2024–2025), in SAR.7 tables · 28,979 rows · version 1
- Masar Holding HR Members playgroundMasar Holding (fictional)A Saudi holding company's employees, org chart, salaries, reviews, leave and incentives from 2015 to the end of 2025, in SAR.10 tables · 5,684 rows · version 1
- Mizan Cloud SaaS Members playgroundMizan Cloud (fictional)A B2B reporting and dashboards SaaS selling monthly and annual subscriptions to companies in Saudi Arabia and the GCC.7 tables · 67,088 rows · version 1
- Shifa Clinics operations Members playgroundShifa Clinics (fictional)A group of six outpatient clinics in Saudi Arabia: bookings, visits, the services delivered and insurance billing.10 tables · 47,764 rows · version 1
- Sahra Logistics warehousing and transport Members playgroundSahra Logistics (fictional)A third-party logistics company with six warehouses in Saudi Arabia: it buys and stores stock, and ships orders to business customers across the Kingdom and the GCC by road, air and sea.12 tables · 92,456 rows · version 1
- Nakheel Hotels bookings Members playgroundNakheel Hotels (fictional)A group of seven boutique hotels in Riyadh, Jeddah, Makkah, Madinah, Abha and Taif selling rooms directly, through online travel agencies (OTAs), to corporate clients and to walk-ins.7 tables · 35,882 rows · version 1
- Tahlia Trading ledger Members playgroundTahlia Trading Company (fictional)A Saudi wholesale and online trading company's general ledger, budgets, payables and bank statement for FY2024–FY2025, in SAR.11 tables · 19,173 rows · version 1
- Wadi Market analytics mart Members playgroundWadi Market (fictional)The data team at Wadi Market, a fictional Saudi online retailer, loads sales, website and app sessions and marketing spend into a star schema every night. Analysts use it for dashboards: revenue by month and region, margin by category, conversion funnels and return on marketing spend.7 tables · 65,785 rows · version 1
- Sooq Analytics event store Members playgroundSooq Analytics (fictional)Sooq Analytics is a fictional company in Jeddah that runs product analytics for an online marketplace. Its event store has grown large and some dashboard queries have become slow. Your job is to find out why with EXPLAIN and fix them with the right indexes.4 tables · 420,200 rows · version 1