formal_quartz_4797
Exemplar
Top 2.2%
Member Nº 1575
Joined Jun 2026
SQL
Common Table Expressions
Timezones
Scalar Subquery
Python
Modules
Tuples
Strings
Spark
Exploding Arrays
Regex Functions
Catalyst Optimizer
Data Modeling
Metric Additivity
Learned
SQL149
Milestones
7-day streak
986 runs in the past 26 weeksActive days: 13 · Max streak: 11
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Recent solves
From products, return product_id, product_name, price where price is BETWEEN 20 AND 40
SQL · medium · lesson
Find all products with a price between 20 and 80 (inclusive)
SQL · medium · lesson
From products, return product_id, price, and a band column using CASE: 'cheap' if price < 20, 'mid'
SQL · medium · lesson
From products, return product_id and product_name where product_name LIKE '%Pro%'
SQL · medium · lesson
Find all transactions made between '2024-01-01' and '2024-06-30' where the total_amount is between 1
SQL · medium · lesson
Show the 3rd through 5th most recent transactions by date
SQL · medium · lesson
Find the 5 most expensive products
SQL · medium · lesson
Find all search queries where the search_term does NOT start with 'SELECT'
SQL · medium · lesson
Find all users whose email address ends with '.com'
SQL · medium · lesson
Find transactions for user 100 or user 234, but only where either the quantity is at least 2 or the
SQL · medium · lesson