level_ram_6594
Warden
Top 7.8%
Member Nº 1953
Joined Jun 2026
SQL
Common Table Expressions
Conditional Aggregation
Self-Join
Python
Functions
Two-Pointer
Math Ops
Spark
Multiple Windows
Inequality Joins
Exploding Arrays
Data Modeling
Self-Referential
Many-to-Many
One-to-One
Pipeline Architecture
SCD in Pipelines
Late-Arriving Data
Backfill Patterns
Solved
SQL18
Python7
Spark4
Data Modeling0
Milestones
Top 9% SQL
Strong Hire
30 active days
10 solved
7-day streak
442 runs in the past 26 weeksActive days: 39 · Max streak: 14
MarAprMayJunJulAugSep
Recent solves
User 360
SQL · hard
Duplicated User Event Messages
SQL · medium
Busiest Pipeline Month
SQL · medium
Implement a sliding window to find the maximum sum of any 3 consecutive numbers in the list [2, 1, 5
Python · medium · lesson
Three Hours for Yesterday's Numbers
Spark · medium
Fault Lines
SQL · medium
Let AQE Handle It
Spark · medium
Push It Down
Spark · medium
The Weight of a Click
SQL · hard
The Merge
Python · easy · lesson