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SQL Top 50

Set Curated practice set

The 50 most-asked SQL interview problems, ordered from easy to hard.

Problems
50
List
Curated
Topics
6
50 problems
1.Email Duplicates
Easy1 co.
2.Big Countries
Easy1 co.
3.Highest Order Placing Customer
Easy1 co.
4.Employees Earning More Than Their Manager
Easy1 co.
5.Odd Non-Boring Movies
Easy1 co.
6.Non-Referred Customers
Easy1 co.
7.Low Bonus Employees
Easy1 co.
8.Visitors Without Transactions
Easy1 co.
9.Unique Subjects per Teacher
Easy1 co.
10.First Login Analysis
Easy1 co.
11.Large Classes
Easy1 co.
12.Average Experience by Project
Easy1 co.
13.Salespersons Without RED Orders
Easy1 co.
14.Product Selling Price Report
Easy1 co.
15.Instant Food Delivery
Easy1 co.
16.Most Frequent Travellers
Easy1 co.
17.Inactive Sellers
Easy1 co.
18.Inactive Customers
Easy1 co.
19.Contest Participation Rate
Easy1 co.
20.Highest Non-Repeating Number
Easy1 co.
21.Sales Analysis
Easy1 co.
22.Valid Triangle Check
Easy1 co.
23.User Follower Count
Easy1 co.
24.Exceeding Tweet Length
Easy1 co.
25.Special Bonus Calculation
Easy1 co.
26.Latest 2020 Login
Easy1 co.
27.Students Enrolled in Non-Existent Departments
Easy1 co.
28.Employee Work Time Summary
Easy1 co.
29.Incomplete Employee Records
Easy1 co.
30.Frequent Actor-Director Duos
Easy1 co.
31.Find Team Size for Each Employee
Easy1 co.
32.Minimum Distance Between Points
Easy1 co.
33.Top Grade per Student
Medium1 co.
34.Warmer Days
Medium1 co.
35.All-Product Buyers
Medium1 co.
36.Immediate First Orders Percentage
Medium1 co.
37.Employees with the Highest Salary in Each Department
Medium1 co.
38.Node Classification
Medium1 co.
39.High-Report Managers
Medium1 co.
40.Football Team Scores
Medium1 co.
41.Find Continuous Ranges in Logs
Medium1 co.
42.Top Ratings in Feb 2020
Medium1 co.
43.A & B Buyers Without C
Medium1 co.
44.Apples vs Oranges
Medium1 co.
45.Follow-up Game Activity
Medium1 co.
46.Swap Consecutive Seats
Medium1 co.
47.Find the Largest Window Between User Visits
Medium1 co.
48.Find All Employees Reporting to the Head of the Company
Medium1 co.
49.Top 3 Salaries per Department
Hard1 co.
50.Track Continuous Periods of Task Failures and Successes
Hard1 co.

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