coral_mesa_9943
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Member Nº 0762
Joined May 2026
SQL
Common Table Expressions
Self-Join
Multiple WINDOWs
Python
Recursion
Splitting & Joining
Binary Search
Spark
Window Frames
Window Deduplication
Higher-Order Functions
Data Modeling
Metric Additivity
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1NF
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Idempotency
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Top 1% SQL
3,112 runs in the past 26 weeksActive days: 168 · Max streak: 168
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Recent solves
Query Structure: Intermediate, Query Execution Order Challenge 1
SQL · medium · lesson
Query Structure: Intermediate, CTEs (WITH clause) Challenge 3
SQL · easy · lesson
Query Structure: Intermediate, CTEs (WITH clause) Challenge 2
SQL · medium · lesson
Query Structure: Intermediate, CTEs (WITH clause) Challenge 1
SQL · medium · lesson
Query Structure: Beginner
SQL · easy · lesson
Query Structure: Beginner
SQL · easy · lesson
Query Structure: Beginner
SQL · easy · lesson
Query Structure: Beginner
SQL · easy · lesson
Query Structure: Beginner, Expressions in SELECT Challenge 2
SQL · easy · lesson
Query Structure: Beginner, Expressions in SELECT Challenge 1
SQL · easy · lesson