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#0350
CTE User Revenue Filter
MediumSQL24 min20 XP
Problem
Return user_id and total_revenue for users whose total revenue is at least 100.
Why This Matters
SQL interviews usually test whether you can turn a business question into the right rows, grouping level, join type, and edge-case behavior.
Schema
orders(order_id INTEGER, user_id INTEGER, amount INTEGER)
Examples
Example 1
Inputuser 1 total 110
Outputuser 1
The CTE gives the aggregate a readable name before filtering.
Constraints
- Return only the requested columns.
- Use deterministic ORDER BY when multiple rows are returned.
- Assume SQLite-compatible SQL unless the prompt states otherwise.
CodeSQL
Visible browser tests run here when available.
Testcases1 visible / 3 hidden categories
Core SQL case
Inputuser 1 total 110
Expected[[1,110]]
The CTE gives the aggregate a readable name before filtering.
Hidden Test Categories
Empty or missing matchesDuplicate rows or tiesNULL values where the pattern commonly breaks