sturdy_tiger_4517
Exemplar
Top 2.7%
Joined Sep 2026
SQL
Window Deduplication
Scalar Subquery
Common Table Expressions
Python
Context Managers
Nested Dicts
Collections
Spark
Transformation Chaining
Column Expressions
Filtering
Data Modeling
Metric Additivity
Semantic Layer
Grain Definition
Pipeline Architecture
SCD in Pipelines
Late-Arriving Data
Event Streaming Platforms
Solved
Milestones
Top 3% SQL
Top 5% Python
50 solved
7-day streak
178 runs in the past 26 weeksActive days: 19 · Max streak: 7
MayJunJulAugSepOct
Recent solves
The Social Graph
Python · easy
The Column Shuffle
Python · medium
The Dominant Signal
Python · easy
The Only Difference
Python · easy
The Original Keeper
Python · easy
The Credits Roll
Data Modeling · hard
The Unbroken Line
Python · medium
Buyers Who Never Browsed
SQL · easy
Personal Best
Data Modeling · easy
The Infection Spread
Python · hard