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Top 50 Window Functions Interview Questions

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

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Window FunctionsStart here. 50 questions · ~1000 min
7-Day Rolling Active UsersMedium
Practice
Recently asked

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
Top Customers by Region VolumeMedium
Practice
Recently asked

Find the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.

Window FunctionsJoinsRankingJPMorganChaseSilicon Valley BankNavi
Calculate 30-Day User RetentionHard
Practice
Recently asked

Use CTEs, joins, and date filtering to calculate 30-day retention by signup cohort from login and feature usage data.

Window FunctionsDate FunctionsAggregationsCurefitIndeedTikTok
Running Total With Window FunctionsEasy
Practice
Recently asked

Calculate each user's running order total over time using a window function.

Window FunctionsDate FunctionsRunning TotalsSparksoftBayerWestern Digital
SQL Window Functions Moving AverageMedium
Practice
Recently asked

Calculate a three-day moving average of active-client revenue using aggregation and SQL window functions.

Window FunctionsData AnalysissqlAAreteSShyena Tech YarnsAATB Financial
Compare Weekly User Activity TrendsMedium
Practice

Aggregate user activity by week, then use LAG to compare sessions and watch time versus the prior active week.

Window FunctionsLag/LeadDate FunctionsB Lab GlobalTapadScale
Top Paid Per DepartmentEasy
Practice
Recently asked

Find the top 3 highest-paid employees in each department using window functions.

Window FunctionsRankingBrillioAubay SpainSabre Systems
Compare Monthly User Retention CohortsMedium
Practice
Recently asked

Calculate month-1 retention for January vs February signup cohorts using joins, date filtering, and aggregation.

Window FunctionsDate FunctionsAggregationsTrideumZulilyeBay
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