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Monthly Revenue Change
A hard SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- mid, senior
Problem
For each month, compute total transaction revenue, then calculate the percentage change from the prior month, rounded to 2 decimal places. Results should appear chronologically. The first month has no prior month, so show null for its percentage change.
Practice This Problem
Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a live PostgreSQL database and grades it instantly.