Top 50 database Interview Questions
The most frequently asked database questions across all roles and companies, ranked by real interview frequency. Updated daily.
Find the second distinct highest salary in S&P Global employee data without using window functions.
S&P GlobalFFareportal
Spectraforce TechnologiesExplain 1NF through higher normal forms, including functional dependencies, anomalies, and normalization trade-offs.
Aqr Capital Management
IBMUse PostgreSQL metadata to list the structure and column details of a database table.
Peraton
CATERPILLARCreate a PostgreSQL management system and return database ownership, active membership, audit volume, and latest activity.
RampCompare PostgreSQL clustering and partitioning by returning their physical behavior, query impact, and appropriate use cases.
AltimetrikReturn the second highest distinct non-null value from a PostgreSQL table.
Itc InfotechSign up to see every question
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Implement a thread-safe collection with atomic batch updates and deterministic ordering.
NiCEImplement SET, GET, and DELETE operations for an in-memory key-value store using a hash map.
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