Grokking SQL for Tech Interviews
Master SQL, Ace Your Interview.
Course Overview
This course is designed for software engineers, database engineers, data engineers, and ML engineers who are preparing for SQL interviews. Whether you are a beginner or looking to brush up on your SQL skills, this course is for you. We will start with an introduction to SQL, covering all the basics, and then, dive into 75 carefully selected SQL interview questions. Each question comes with a detailed explanation to help you understand the concepts thoroughly. Our goal is to make sure you feel confident and well-prepared for your SQL interviews. The questions are picked to reflect what you might face in real-world interviews. Join us to master SQL and ace your next coding interview!
Course Content
Order of Execution
SQL Functions
Nested Queries
SET Operations
Database Backup & Restore
Interview Problems - Easy
1. Major Cities
2. Not boring movies
3. Triangle Judgement
4. Biggest Single Number
5. Product Sales Analysis I
6. Product Sales Analysis II
7. Game Play Analysis I
8. Game Play Analysis II
9. Queries Quality and Percentage
10. Average Selling Price
11. Weather Type in Each Country
12. Students and Examinations
13. Ads Performance
14. Group Sold Products By The Date
15. Find Users With Valid E-Mails
16. Sellers With No Sales
17. Average Time of Process p
18. Find Followers Count
19. Ad-Free Sessions
20. Bikes Last Time Used
21. Daily User Engagement Levels
22. Employee Attendance Record
23. Library Book Loans
24. Customer Purchase Summary
25. Employee Email Verification
26. Unused Accounts
27. Patient Appointment No-Shows
28. Books and Authors
29. High School Attendance
30. Employee Absences
31. Green Product Identification (Easy)
32. Employee Department Exclusion (Easy)
33. Sales Person (Easy)
34. Employee Task Tracking (Easy)
35. Long Comments (Easy)
Interview Problems - Medium
1. Winning Candidate
2. Second Degree Follower
3. Nth Highest Salary
4. Game Play Analysis III
5. Game Play Analysis IV
6. Active Businesses
7. Product Price at a Given Date
8. Monthly Transactions II
9. Team Scores in Football Tournament
10. Page Recommendations
11. Running Total for Different Genders
12. Evaluate Boolean Expression
13. Active Users
14. Find Interview Candidates
15. Suspicious Bank Accounts
16. Order Fulfillment Rate (Medium)
17. Last Person to Fit in the Elevator (Medium)
18. Retail Expansion Analysis (Medium)
19. Employee Collaboration Networks (Medium)
20. Second Fastest Time in Races (Medium)
Interview Problems - Hard
1. Trips and Users
2. Human Traffic of Stadium
3. Students Report By Geography
4. Game Play Analysis V
5. Number of Transactions per Visit
6. Find the Quiet Students in All Exams
7. First and Last Call On the Same Day
8. Build the Equation
9. Longest Winning Streak
10. Dynamic Pivoting of a Table
11. Dynamic Unpivoting of a Table
12. Generate the Invoice
13. Popularity Percentage
14. Status of Flight Tickets
15. Viewers Turned Streamers
Test Your Knowledge
1. High Performing Employees (Easy)
2. Student Course Averages (Easy)
3. Library Book Checkout Percentage (Easy)
4. Employee Performance and Improvement Rate (Easy)
5. Find Popular Posts (Easy)
6. Main Office Assignment for Each Employee (Easy)
7. Rectangle Validation (Easy)
8. Library Book Checkouts by Date (Easy)
9. Same-Day Appointment Fulfillment (Medium)
10. Departments with High Earning Employees (Medium)
11. Students Who Attended All Courses (Medium)
12. Library Book Checkouts First Year (Medium)
13. Repeated Values in Sequence (Medium)
14. Product Price on a Specific Date (Medium)
15. School Top Achievers by Subject (Hard)
What people say about our courses
About the Author
Arslan Ahmad
Industry Expertise & Leadership
Arslan Ahmad is the lead author of Grokking SQL for Tech Interviews. As the founder of Design Gurus and a former FAANG hiring manager, he has worked at industry giants like Facebook (now Meta) and Microsoft.
He has conducted hundreds of system design interviews, giving him unique insight into what top tech companies look for in candidates.
The course also incorporates expertise from senior engineers at Google, Meta, Amazon, Microsoft, and Uber, ensuring you learn system design best practices from professionals who have built and scaled real-world systems.
500+
Interviews Conducted
10k+
Students Taught
