Interview Questions

1,000+ real questions across SQL, Python, statistics, ML and more.

Modern Classic

Practice mode

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

Recommendation SystemPRO

MediumMetaJoins & Sets

Find all posts which were reacted to with a heart

EasyMetaJoins & Sets

Highest Cost OrdersPRO

MediumWindow Functions

New ProductsPRO

MediumJoins & Sets

Consecutive Days

HardWindow Functions

Salaries DifferencesPRO

EasyJoins & Sets

Best Selling Item

HardWindow Functions

Rank Variance Per Country

HardMetaWindow Functions

Revenue Over TimePRO

HardAmazonWindow Functions

Actor Rating Difference AnalysisPRO

HardWindow Functions

Player with Longest StreakPRO

HardWindow Functions

Number of Comments Per User in 30 days before 2020-02-10PRO

EasyMetaWindow Functions

Find the genre of the person with the most number of oscar winningsPRO

HardNetflixWindow Functions

Users By Average Session Time

MediumMetaWindow Functions

Acceptance Rate By Date

MediumMetaJoins & Sets

Finding User Purchases

MediumAmazonWindow Functions

Submission TypesPRO

EasyJoins & Sets

Total Cost Of Orders

EasyJoins & Sets

Top Actor Ratings by GenrePRO

HardWindow Functions

Workers With The Highest Salaries

EasyJoins & Sets

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