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

L4

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.

Summary

Two servers, same region, both alive.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and grades it automatically.