hasty_stork_4497
Exemplar
Top 2.2%
Member Nº 2830
Joined Jul 2026
SQL
Self-Join
Type Casting
Group Filtering
Python
Functions
f-strings
Strings
Spark
Multiple Windows
Distribution Functions
Exploding Arrays
Data Modeling
Self-Referential
Many-to-Many
One-to-One
Solved
SQL1
Python0
Spark0
Data Modeling0
Milestones
Top 100
7-day streak
1,230 runs in the past 26 weeksActive days: 26 · Max streak: 16
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Recent solves
High-Rated In-Stock Percentage
SQL · easy · lesson
Two Names on the Ledger
SQL · easy · lesson
Calculate the running average response time for each server ordered by timestamp
SQL · medium · lesson
From transactions, return transaction_id, total_amount, and SUM(total_amount) OVER (ORDER BY transac
SQL · medium · lesson
For each ad impression, show the first campaign that user ever interacted with.
SQL · medium · lesson
Where You Stand
SQL · easy · lesson
Given names, use a for loop to build a new list called upper_names containing each name converted to
Python · medium · lesson
Given nums, use a for loop to calculate the sum of all numbers
Python · medium · lesson
Define a function make_tag(name, count) with a docstring 'Return a label like 3x Widget.' that retur
Python · medium · lesson
Define a function classify_score(score) that returns 'A' if score >= 90, 'B' if score >= 80, 'C' if
Python · medium · lesson