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Running Node Pairs
A easy SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- mid
Problem
Find pairs of servers in the same region that are both running. Show unique pairs where the lower node ID appears in the first column.
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.