Top 50 database management Interview Questions
The most frequently asked database management questions across all roles and companies, ranked by real interview frequency. Updated daily.
Optimize a PostgreSQL reporting query by reducing intermediate rows, using appropriate joins, and calculating monthly performance efficiently.
The Cigna Group
ElemicaExplain how TRUNCATE and DELETE differ in row removal, transaction behavior, and identity handling.
ArcesiumOptimize a slow PostgreSQL query on a large dataset by choosing better filters, joins, and indexes.
CitiOOptimoveTThoucentricUse PostgreSQL metadata to list the structure and column details of a database table.
Peraton
CATERPILLARExplain how to reduce latency for a query under heavy multi-tenant load.
SWIFT
FilevineExplain DDL, DML, and DCL, then classify PostgreSQL commands by their SQL command category.
Newgen SoftwareCompare PostgreSQL index strategies by read latency, write overhead, storage size, and an overall cost score.
Capital Technology GroupDescribe what an SQL index is and how it improves query performance.
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