jolly_mist_7102

Exemplar

Top 2.7%

Joined Sep 2026

SQL

Common Table Expressions

Timezones

Type Casting

Python

Modules

Tuples

Dict Methods

Spark

Window Deduplication

Higher-Order Functions

Catalyst Optimizer

Data Modeling

Metric Additivity

Indexing

Constraints

Solved

Data Modeling0

Milestones

First milestone at 10 problems solved.

498 runs in the past 26 weeksActive days: 5 · Max streak: 3

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Recent solves

Data Types: Intermediate, Time zones and UTC handling Challenge 2

SQL · medium · lesson

Data Types: Intermediate, BOOLEAN and NULL logic Challenge 2

SQL · easy · lesson

Data Types: Intermediate

SQL · medium · lesson

Data Types: Intermediate

SQL · easy · lesson

Data Types: Intermediate

SQL · medium · lesson

Data Types: Intermediate, TRY_CAST and implicit casts Challenge 1

SQL · medium · lesson

Data Types: Intermediate, TRY_CAST and implicit casts Challenge 2

SQL · easy · lesson

Data Types: Intermediate, Time zones and UTC handling Challenge 1

SQL · easy · lesson

Data Types: Intermediate, TIMESTAMP vs TIMESTAMPTZ Challenge 2

SQL · easy · lesson

Data Types: Intermediate, TIMESTAMP vs TIMESTAMPTZ Challenge 1

SQL · medium · lesson