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DQ Score Spread
A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- mid
Problem
Each table's data quality total is the sum of fail percentages across all its rules. What is the difference between the table with the highest total and the table with the lowest total?
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.