Top Pattern Matches

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

Domain

SQL

Difficulty

medium

Seniority

mid

Problem

Our server logs contain messages with embedded reference numbers. Find the 10 servers whose log messages most frequently match a pattern of a 3-digit prefix, a dash, then 4 or more digits. Return server_name and match count, from highest first.

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