golden_lynx_6202
Exemplar
Top 2.2%
Member Nº 4812
Joined Aug 2026
SQL
Grouping
Distinct Counting
Sorting Results
Python
Splitting & Joining
Frequency Counting
Binary Search
Spark
Spark Execution Model
Date Formatting
Spark UI Diagnosis
Data Modeling
Surrogate Keys
Metric Additivity
Constraints
Pipeline Architecture
Late-Arriving Data
Event Streaming Platforms
Event-Driven Architecture
Solved
SQL32
Python25
Data Modeling3
Spark0
Pipeline Architecture0
Milestones
Top 4% SQL
Top 5% Python
50 solved
367 runs in the past 26 weeksActive days: 10 · Max streak: 5
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Recent solves
Personal Best
Data Modeling · easy
A Number for the Seller
Data Modeling · easy
The Vanishing State
Data Modeling · easy
Type a product catalog: integer-cents money, whole-number stock, and a status lookup table
Data Modeling · medium · lesson
Type every column in a product catalog schema
Data Modeling · medium · lesson
Design a payments table: UUID key, integer cents for money, and a status lookup table
Data Modeling · medium · lesson
Pick the right data type for every employees column
Data Modeling · medium · lesson
Design a feature flags table using boolean for toggle state and JSON for flexible configuration data
Data Modeling · medium · lesson
Choose the right type for every column of a products table
Data Modeling · medium · lesson
Design a sessions table where both start and end times need full timestamp precision.
Data Modeling · medium · lesson