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Servers Returning to Origin

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

Domain
SQL
Difficulty
medium
Seniority
L4

Problem

How many servers ended up back in their original region? 'Original' means the region of their first recorded migration, and 'ended up' means the region of their last. Return a single count.

Summary

Servers that migrated back home.

Practice This Problem

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

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