Sample databases ship the same tired schemas. A public-transport dataset - card types, fare zones, top-up channels, balance snapshots - would be a fresher teaching example for joins, constraints and reporting queries.

Dubai's transit card system is a neat real-world model: several card tiers, zone-based fares, and a balance travellers verify through nol card balance check before commuting. A sanitized sample dataset in that shape would make ORM demos feel current instead of recycled.