DataDrivenDataDrivenDataDriven
LearnPracticeInterviewDailyJobsCommunity

hml-cmd

Rank #32
DataDrivenDataDriven
Savant
Top 0.9%
Member Nº 4217
Joined Aug 2026
HML-cmd
SQLPYSPKDMPA
SQL
Storage Optimization
String Building
Aggregate Window Fns
Python
Generators
Copying Lists
Dict Merging
Spark
Higher-Order Functions
Exploding Arrays
Catalyst Optimizer
Data Modeling
Self-Referential
Many-to-Many
One-to-One
Learned
478LEARNED
Python351
SQL111
Spark16
Milestones
Top 100
Steward ×2
7-day streak
1,949 runs in the past 26 weeksActive days: 12 · Max streak: 10
MayJunJulAugSepOct
Recent solves
Lazy Evaluation: Beginner
Spark · easy · lesson
8 weeks ago
Lazy Evaluation: Beginner, The Action Catalog Challenge 1
Spark · easy · lesson
8 weeks ago
Lazy Evaluation: Beginner, Nothing Runs Until an Action Challenge 1
Spark · easy · lesson
8 weeks ago
Execution Model: Beginner
Spark · easy · lesson
8 weeks ago
Execution Model: Beginner
Spark · easy · lesson
8 weeks ago
Execution Model: Beginner
Spark · easy · lesson
8 weeks ago
Execution Model: Beginner, A Job's Life, End to End Challenge 2
Spark · easy · lesson
8 weeks ago
Execution Model: Beginner, A Job's Life, End to End Challenge 1
Spark · easy · lesson
8 weeks ago
Execution Model: Beginner, Cores and Slots Challenge 2
Spark · easy · lesson
8 weeks ago
Execution Model: Beginner, Cores and Slots Challenge 1
Spark · easy · lesson
8 weeks ago
DataDrivenDataDrivenDataDriven

The community data engineers call home

ResourcesBlogAboutContact
Substack Newsletter

Accelerate your data engineering career

© DataDriven·We help you get hired there·We just don't work there·Logos and trademarks belong to their owners
TermsPrivacySecurityHelp