scarlet_heron_5261
Savant
Top 0.7%
Member Nº 2766
Joined Jul 2026
SQL
Common Table Expressions
Array Aggregation
Inequality Joins
Spark
Collecting Values
Inequality Joins
Distribution Functions
Data Modeling
Self-Referential
Many-to-Many
One-to-One
Learned
SQL321
Milestones
Top 100
1,360 runs in the past 26 weeksActive days: 15 · Max streak: 6
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Recent solves
Format the 5 most recent deploys as ISO and European dates
SQL · medium · lesson
Format transaction dates as US-style MM/DD/YYYY strings
SQL · medium · lesson
Count batch jobs that started each week
SQL · medium · lesson
Count transactions per month
SQL · medium · lesson
Build a signature for each distinct server name
SQL · medium · lesson
Build a deployment summary string for each deploy log in the format: '<service> v<version> deployed
SQL · medium · lesson
From server_logs, create a formatted log identifier by zero-padding the log_id to 6 digits with the
SQL · medium · lesson
For each transaction, compute expected_total as quantity * price (from products)
SQL · medium · lesson
Using a CTE named high_value that selects product_id and SUM(total_amount) AS revenue from transacti
SQL · medium · lesson
For each transaction, return transaction_id, product_name, and total_amount by INNER JOINing to prod
SQL · medium · lesson