nat101
Warden
Top 7.8%
Member Nº 3657
Joined Jul 2026
SQL
Correlated Subquery
Multiple WINDOWs
Common Table Expressions
Spark
Exploding Arrays
Regex Functions
Catalyst Optimizer
Data Modeling
Self-Referential
Many-to-Many
One-to-One
Solved
SQL29
Milestones
Top 4% SQL
Hire verdict
10 solved
592 runs in the past 26 weeksActive days: 8 · Max streak: 5
MarAprMayJunJulAugSep
Recent solves
Same-Day Session and Transaction Correlation
SQL · hard
Filtered User Roster
SQL · easy
Chain of Command
SQL · hard
The Transaction Breakdown
SQL · easy
Bronze Medal
SQL · easy
The Notification That Paid Off
SQL · hard
Retried Failed API Calls
SQL · medium
Beyond the Signup
SQL · medium
Above Average Product Prices
SQL · medium
The Ninety-Day Comeback
SQL · hard