Interview Questions

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Modern Classic

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Window Functions Deep Dive

Master ranking, partitions, and running totals

Highest Cost OrdersPRO

MediumWindow Functions

Consecutive Days

HardWindow Functions

Best Selling Item

HardWindow Functions

Window Functions Deep Dive

Master ranking, partitions, and running totals

Free Data Analyst Track

Build momentum — no premium required

Find all posts which were reacted to with a heart

EasyMetaJoins & Sets

Finding Updated Records

EasyMicrosoftWindow Functions

Users By Average Session Time

MediumMetaWindow Functions

Free Data Analyst Track

Build momentum — no premium required

Filtered Results

Find all posts which were reacted to with a heart

EasyMetaJoins & Sets

Consecutive Days

HardWindow Functions

Best Selling Item

HardWindow Functions

Rank Variance Per Country

HardMetaWindow Functions

Finding Updated Records

EasyMicrosoftWindow Functions

Users By Average Session Time

MediumMetaWindow Functions

Acceptance Rate By Date

MediumMetaJoins & Sets

Finding User Purchases

MediumAmazonWindow Functions

Total Cost Of Orders

EasyJoins & Sets

Workers With The Highest Salaries

EasyJoins & Sets

Monthly Percentage Difference

HardAmazonWindow Functions

Average Salaries

EasyWindow Functions

Risky Projects

MediumLinkedInWindow Functions

Completion Rate by Title

EasyNetflixJoins & Sets

Busiest Restaurants in June 2025

MediumDoorDashWindow Functions

Thumbs-Up Rate by Model Version

MediumOpenAIAggregations

AI Feature Adoption Funnel

MediumJoins & Sets

Finding Purchases

MediumAmazonWindow Functions

Ranking Most Active Guests

MediumAirbnbWindow Functions

Number Of Units Per Nationality

MediumAirbnbJoins & Sets

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Recommendation SystemPRO

Find all posts which were reacted to with a heart

Highest Cost OrdersPRO

Highest Cost OrdersPRO

Consecutive Days

Best Selling Item

Find all posts which were reacted to with a heart

Finding Updated Records

Users By Average Session Time

Find all posts which were reacted to with a heart

Consecutive Days

Best Selling Item

Rank Variance Per Country

Finding Updated Records

Users By Average Session Time

Acceptance Rate By Date

Finding User Purchases

Total Cost Of Orders

Workers With The Highest Salaries

Monthly Percentage Difference

Average Salaries

Risky Projects

Completion Rate by Title

Busiest Restaurants in June 2025

Thumbs-Up Rate by Model Version

AI Feature Adoption Funnel

Finding Purchases

Ranking Most Active Guests

Number Of Units Per Nationality

Find all posts which were reacted to with a heart

Finding Updated Records

Users By Average Session Time

Recommendation SystemPRO

Find all posts which were reacted to with a heart

Highest Cost OrdersPRO

Highest Cost OrdersPRO

Consecutive Days

Best Selling Item

Find all posts which were reacted to with a heart

Consecutive Days

Best Selling Item

Rank Variance Per Country

Finding Updated Records

Users By Average Session Time

Acceptance Rate By Date

Finding User Purchases

Total Cost Of Orders

Workers With The Highest Salaries

Monthly Percentage Difference

Average Salaries

Risky Projects

Completion Rate by Title

Busiest Restaurants in June 2025

Thumbs-Up Rate by Model Version

AI Feature Adoption Funnel

Finding Purchases

Ranking Most Active Guests

Number Of Units Per Nationality