data_vader
Exemplar
Top 2.7%
Member Nº 1744
Joined Jun 2026
SQL
Multiple WINDOWs
Storage Optimization
Row Offsets
Python
String Methods
List Modification
Loop Control
Spark
Multiple Windows
Distribution Functions
Exploding Arrays
Data Modeling
Self-Referential
Many-to-Many
One-to-One
Learned
SQL166
Python75
Milestones
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1,138 runs in the past 26 weeksActive days: 17 · Max streak: 4
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Recent solves
Query Structure: Intermediate, Subqueries for temp results Challenge 2
SQL · medium · lesson
Query Structure: Intermediate, Query Execution Order Challenge 5
SQL · medium · lesson
Query Structure: Intermediate, Query Execution Order Challenge 4
SQL · medium · lesson
Query Structure: Intermediate, Query Execution Order Challenge 1
SQL · medium · lesson
Query Structure: Intermediate, CTEs (WITH clause) Challenge 5
SQL · medium · lesson
Query Structure: Intermediate, CTEs (WITH clause) Challenge 4
SQL · medium · lesson
Query Structure: Intermediate, CTEs (WITH clause) Challenge 2
SQL · medium · lesson
Window Functions: Advanced, Windows vs Self-Joins Challenge 4
SQL · medium · lesson
Window Functions: Advanced, Windows vs Self-Joins Challenge 2
SQL · medium · lesson
Window Functions: Intermediate
SQL · medium · lesson