Highest Node Density Regions

A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

Find the top 3 regions by node density, defined as unique nodes divided by unique node types in that region. Tied regions share the same rank. Show region and density.

Summary

Some regions are packed with nodes.

Practice This Problem

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