rem
Warden
Top 7.8%
Member Nº 4913
Joined Sep 2026
SQL
Date Truncation
Set Combination
First & Last Values
Python
Guard Clauses
Nested Loops
Math Ops
Spark
Intermediate DataFrames
SQL Expressions in DataFrames
Spark SQL API
Data Modeling
Grain Definition
SCD Strategy
Star Schema
Pipeline Architecture
Medallion Architecture
ELT vs ETL
Backfill Patterns
Solved
SQL13
Python10
Data Modeling0
Pipeline Architecture0
Milestones
Hire verdict
10 solved
77 runs in the past 26 weeksActive days: 3 · Max streak: 3
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Recent solves
Who Stayed
SQL · hard
Daily Error Count Change
SQL · medium
The Forward Fill
Python · easy
The Shape of a User
SQL · medium
The Elevator Trace
Python · medium
Sort Descending
Python · easy
Mentorship User Pairs
SQL · medium
The Row Count Surprise
SQL · easy
The Lazy Stream
Python · hard
Dictionary Key Intersection
Python · medium