Top 50 Self-Joins Interview Questions

Use a self-join to find Arcesium employees whose salaries exceed their direct managers' salaries.

JoinsSelf-JoinsArcesiumCATERPILLAR

Use a self-join to compare each region's monthly orders and revenue against its prior month.

Date FunctionsSelf-JoinsAggregationsairtelInstacart

Use a self-join to pair each vehicle telemetry event with its immediately following event.

Date FunctionsJoinsData ManipulationTesla

Find overlapping subscription periods for each customer account using window functions and date comparisons.

Window FunctionsDate FunctionsSelf-JoinsRipplingKraken

Use CTEs and window functions to count Chime users with a login streak of exactly three consecutive days.

Window FunctionsDate FunctionsCTEsChime

Measure monthly user retention with a self-join and conditional aggregation across Bain & Company platform activity.

Self-JoinssqlBain &SASItc Infotech