firm_slate_4956
Warden
Top 8.4%
Joined Sep 2026
SQL
Correlated Subquery
Inner Joins
Common Table Expressions
Python
Frequency Counting
Dict Methods
Nested Dicts
Spark
Window Frames
Window Deduplication
Multiple Windows
Data Modeling
Metric Additivity
Constraints
Pipeline Architecture
Batch vs Streaming
Full vs Incremental Load
File-Based Ingestion
Solved
Pipeline Architecture0
Milestones
10 solved
125 runs in the past 26 weeksActive days: 15 · Max streak: 4
AprMayJunJulAugSepOct
Recent solves
Make It Faster, The Usual Suspects Challenge 1
Spark · easy · lesson
Daily Session and User Counts
SQL · medium
Where They Used to Live
Data Modeling · medium
Daily Error Count Change
SQL · medium
The Word Census
Python · easy
Ingestion Patterns: Beginner, The Four Shapes of Ingestion Challenge 1
Pipeline Architecture · medium · lesson
Into One Stream
Python · easy
The Loudest Neighbor
SQL · hard
The Traffic Director
Python · easy
The Crown Jewels
SQL · easy