german_gerken
Arbiter
Top 0.3%
Member Nº 4980
Joined Sep 2026
SQL
Window Deduplication
Common Table Expressions
Inequality Joins
Python
Generators
List Comprehension
Modules
Spark
Window Frames
Window Deduplication
Higher-Order Functions
Data Modeling
Metric Additivity
Surrogate Keys
Indexing
Solved
Data Modeling0
Milestones
Weekly gold ×2
Top 100
Steward ×2
Weekly silver
Top 2% SQL
Top 6% Python
1,099 runs in the past 26 weeksActive days: 28 · Max streak: 24
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Recent solves
Control Flow: Beginner, Branching with if-else Challenge 2
Python · medium · lesson
Control Flow: Beginner, Branching with if-else Challenge 1
Python · easy · lesson
Control Flow: Beginner, Branching with if-else Challenge 3
Python · easy · lesson
Control Flow: Beginner, The if Statement Challenge 2
Python · easy · lesson
Control Flow: Beginner, The if Statement Challenge 1
Python · medium · lesson
Control Flow: Beginner, The if Statement Challenge 3
Python · easy · lesson
Dates: Intermediate
SQL · medium · lesson
Dates: Intermediate
SQL · medium · lesson
Dates: Intermediate
SQL · medium · lesson
Dates: Intermediate, Grouping by Time Parts Challenge 2
SQL · medium · lesson