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SQL Interview Questions

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CompanyTitleDifficultyStatus

Facebook

Active User Retention

Hard

Wayfair

Y-on-Y Growth Rate

Hard

Amazon

Maximize Prime Item Inventory

Hard

Google

Median Google Search Frequency

Hard

Facebook

Advertiser Status

Hard

McKinsey

3-Topping Pizzas

Hard

UnitedHealth

Patient Support Analysis (Part 3)

Hard

UnitedHealth

Patient Support Analysis (Part 4)

Hard

Stripe

Repeated Payments

Hard

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Tags

Calculate Rates7

Array Functions2

Minimum/Maximum4

Date-Time Operations13

Mathematical Functions3

Aggregations24

Ace the Data Science Interview15

Type Conversion12

Categorize Data15

Window Functions12

Top X5

Existence Check5

Cumulative Sums0

SQL Series1

Conditional Aggregation8

String Functions2

Unique Results8

User Behavior5