SQL Practice
Real-life business problems on real tables. Read the scenario, write the query, and get it checked instantly.
Intermediate25 pts
Who pays how: payment method share
Subqueries
Solve challengeIntermediate25 pts
Where does the card money go?
Subqueries
Solve challengeIntermediate25 pts
Departments that keep patients longer than the hospital average
Subqueries
Solve challengeIntermediate25 pts
Passengers who out-spend the average traveller
Subqueries
Solve challengeIntermediate25 pts
Superfans who never wander off
Subqueries
Solve challengeExpert50 pts
Employees paid above their department average
Subqueries
Solve challenge