SQL Practice
Real-life business problems on real tables. Read the scenario, write the query, and get it checked instantly.
Basic10 pts
On time, late or still unpaid?
NULL & CASE
Solve challengeBasic10 pts
Who is still in a bed?
NULL & CASE
Solve challengeBasic10 pts
How many completed trips never got a rating?
NULL & CASE
Solve challengeBasic10 pts
Age groups and the people who never told us
NULL & CASE
Solve challengeIntermediate25 pts
Stars without words
NULL & CASE
Solve challengeIntermediate25 pts
On-time scorecard by airline and quarter
NULL & CASE
Solve challengeIntermediate25 pts
Skip rate by device
NULL & CASE
Solve challengeIntermediate25 pts
The ten most valuable subscribers
NULL & CASE
Solve challenge