medium📅 Daily
Fix the Broken Pipeline
DataFrame Operations
Start Challenge
medium
✅Top 3 Products per Category
Window Functions
Retry Challenge
hard
Optimize the 100M-Row Join
Performance
Start Challenge
easy
✅Word Frequency Counter
Data Structures
Retry Challenge
medium
Running Total Revenue
Window Functions
Start Challenge
medium
Parse Apache Logs with Regex
String Processing
Start Challenge
easy
Find Duplicate Emails
Aggregation
Start Challenge
hard
Median Salary per Department
Window Functions
Start Challenge
easy
✅Pandas → PySpark Migration
DataFrame Basics
Retry Challenge
hard
Anomaly Detection (Z-Score)
Algorithms
Start Challenge
hard
PySpark Structured Streaming
Streaming
Start Challenge
easy
Second Highest Salary
Subqueries
Start Challenge