formal_wolf_7586
Exemplar
Top 2.6%
Member Nº 3325
Joined Jul 2026
SQL
Correlated Subquery
Window Deduplication
Multiple WINDOWs
Python
Context Managers
Collections
Frequency Counting
Spark
Spark Execution Model
Distributed Primitives
Data Modeling
Metric Additivity
Indexing
Constraints
Pipeline Architecture
Batch vs Streaming
Solved
Data Modeling0
Pipeline Architecture0
Milestones
Top 100
Steward ×3
Top 1% SQL
Top 5% Python
100 solved
First interview
522 runs in the past 26 weeksActive days: 28 · Max streak: 5
MayJunJulAugSepOct
Recent solves
The Notification That Paid Off
SQL · hard
Beyond 3NF, Fourth Normal Form (4NF) Challenge 1
Data Modeling · medium · lesson
Beyond 3NF, Boyce-Codd Normal Form Challenge 1
Data Modeling · medium · lesson
Normalization
Data Modeling · medium · lesson
Normalization, Identifying Normal Form Challenge 1
Data Modeling · medium · lesson
Normalization, Third Normal Form (3NF) Challenge 1
Data Modeling · medium · lesson
Normalization, Second Normal Form (2NF) Challenge 1
Data Modeling · medium · lesson
Normalization, Data Gets Out of Sync Challenge 1
Data Modeling · medium · lesson
The Tiebreaker
SQL · easy
Largest Single Cloud Cost
SQL · medium