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Top 50 complex queries Interview Questions

The most frequently asked complex queries questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~12htotal time
102companies covered
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1
Window FunctionsStart here. 14 questions · ~196 min
SQL for Declining Inventory TurnoverHard
Practice

Identify stores with three-month inventory turnover declines, calculate monthly changes, and rank decline severity.

Window FunctionsLag/LeadDate FunctionsCCouche-TardNykaa
SQL Window Functions for Portfolio AnalysisHard
Practice
Recently asked

Rank portfolios by monthly net transaction value using PostgreSQL window functions.

Window FunctionsPivotfinancial dataMacquarie Group
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2
complex queries13 questions · ~182 min
SQL: Inline Query DefinitionEasy
Practice

Use an inline query to return the average order amount by customer segment.

complex queriesdatabase queryingdatabase conceptsGoogle
SQL Queries and ExamplesEasy
Practice

Describe your SQL experience and give examples of queries you have written.

complex queriesdatabase queryingAggregationsMicrosoft
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3
Data Manipulation3 questions · ~42 min
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4
More topics20 questions · ~280 min
Writing Complex QueriesHard
Practice

Analyze monthly customer revenue, growth, rankings, rolling totals, and support volume with layered PostgreSQL queries.

Lag/Leadbusiness problemcomplex queriesDatadog
Project Volume Change QueryMedium
Practice

Find the project with the largest day-over-day average volume increase by cost center.

analytics toolscalculationscomplex queriesMeta
Pivot Without Pivot OperatorMedium
Practice

Pivot rows into columns by category using CASE expressions and aggregation.

Group Bycomplex queriesCase WhenAmazon Web Services
Survey Conversion Rate by QuestionMedium
Practice

Use aggregation to find the survey question with the highest answer rate from Meta survey logs.

Rankingcomplex queriesAggregationsMeta
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