Top 50 Joins Interview Questions
The most frequently asked Joins questions across all roles and companies, ranked by real interview frequency. Updated daily.
Extract qualifying market observations by venue and price, then return them in chronological order.
Equifax
DPR Construction
RigUpCalculate month-over-month sales growth for each product category using JOINs and window functions.
Wayfair
REVOLVE
FanaticsJoin policy and ISO ClaimSearch claim data to aggregate claim counts and incurred losses by state and policy type.
Verisk Analytics
Marsh
Broadridge Financial SolutionsFind the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.
JPMorganChase
Silicon Valley Bank
NaviUse joins, a CTE, and aggregation to rank the top 5 products by non-returned revenue in the last 30 days.
Blue Nile
O'Reilly Auto Parts
CengageJoin customers and transactions, filter to the previous quarter, aggregate spend, and return the top three customers by total spend.
Apptio
Quantiphi
DiscoverCompute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.
Gain Digital
TCS
Zest AIQuery a comparison table to present the key structural and operational differences between SQL and NoSQL databases.
Cogito
Ramsey Solutions
Pyramid ConsultingSign up to see every question
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