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
Itc InfotechUse recursive CTEs and anti-join logic to find active VLink employees without a current department.
VLinkFind Airtel subscribers with the third-highest January data usage using joins, aggregation, a CTE, and DENSE_RANK.
airtelUse a normalization CTE and self-join to find FanDuel player records sharing an email or phone number.
FanduelUse LEFT JOINs, a CTE, and aggregation to summarize 2025 claims and completed payments for active Guidewire PolicyCenter policies.
Use a CTE, LEFT JOIN, and MIN aggregation to find the lowest active Bolt Drive price for every car model.
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Approach for migrating data between databases with validation, idempotent loads, and schema change handling.
EPAM Systems
Capital Fund Management
NextdoorKey SQL database metrics to watch for bottlenecks in pipeline workloads.
TEKsystems
Programming
Checkr