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With this course, you will:

  • Practice 100 interview questions
  • Practice with coding exerises
  • Earn a professional certificate
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Prerequisites

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Fi Coin

Average Salary (US)

$81,000

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Prerequisites

None

Start Now!

Enroll to Get Started
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Course

SQL Interview Questions

Ace your coding interview with this comprehensive and curated course of the most important SQL interview questions.

  • Level: Intermediate

  • Duration: 2 weeks

  • Type: Interactive

  • Language: English

  • Practice Problems: 45+

Course Content

Chapter 1:

Introduction

1.1Introduction to Course
Chapter 2:

SQL Basic Queries

2.1Top 4 Teams in the League2.2Popular Books in the Last Decade2.3Laptop vs. Mobile Viewership2.4Either/Or But Not Both2.5Order Alphabetically When Condition is Met
Chapter 3:

Intermediate Questions

3.1Retrieve Orders Delivered In Certain Days3.2Sort the Monthly Sales3.3Sort the Candidates in Ascending Order3.4Books With Multiple Words But No 'Z'3.5Movies With Duration Greater Than Average3.6Anime With Above Average Ratings3.7Largest Non-Repeating Number3.8Interesting Movies With Odd Numbered IDs3.9Daily Active Users3.10JOIN Two Tables
Chapter 4:

Advanced Questions

4.1Delete Duplicate Rows From a Table4.2Top 3 Highest-Paid Employees4.3Pivot Tables4.4Fix the Names4.5Customer Payment in 7 Days4.6JOIN Three Tables4.7Employees and Salaries4.8Query Optimization4.9Gameplay Analysis4.10Highest Rated Episode
Chapter 5:

What's Wrong With This Code?

5.1Introduction5.2Unique Key Logical Error5.3Naming Conflict5.4String vs. Numeric Comparison5.5JOIN Type5.6Wrong Use of GROUP BY5.7Using BETWEEN5.8ON DELETE CASCADE5.9Missing WHERE Clause5.10Multiple Primary Keys5.11Reference Error5.12Incorrect Table Alias5.13Incorrect Alias Reference5.14Logical Error5.15Incorrect JOIN Reference5.16Incorrect Use of CASE
Chapter 6:

What Will Happen If We Execute This Query?

6.1Introduction6.2Use of LIMIT6.3Parentheses to Group Conditions6.4TOP vs. LIMIT6.5NULL Values With IN6.6Using SUBQUERY6.7Wildcard Characters6.8Using IS NULL Operator6.9INNER JOINs6.10DISTINCT With GROUP BY6.11Order of Execution
Chapter 7:

Theory Questions

7.1Types of SQL Statements7.2Difference Between SQL and MySQL7.3Difference Between SQL and NoSQL7.4Length of a String in SQL7.5Retrieve Current Date and Time7.6Handle NULL Values in SQL7.7Insert Multiple Rows With a Single Statement7.8Primary Key in a Database7.9Normalization in Database7.10JOINS7.11DELETE vs. TRUNCATE vs. DROP7.12Purpose of GROUP BY Clause7.13UNION vs. UNION ALL7.14Indexes in Database7.15Stored Procedure vs. Function7.16ACID Properties7.17View and Table in SQL7.18The HAVING Clause7.19ON DELETE CASCADE on a Foreign Key7.20INNER JOIN vs. OUTER JOIN7.21SUBQUERY in SQL7.22Data Integrity7.23Foreign Keys and Data Integrity7.24SQL Triggers7.25Order of Execution in SQL
Chapter 8:

Practices

8.1Bottom Three Teams in the League8.2Books in the 21st Century8.3Separate the Viewership8.4Employee Name That Starts With S8.5Ascending Ordering8.6Order Delivered After 3 Days8.7Smallest Non-Repeating Number8.8Monthly Sales in Ascending Order8.9Candidates Poor at Python and SQL8.10Books That Contain Z on Their Title8.11Highest Rated Anime Titles8.12Retrieve Fantasy Movie8.13Users With No Checkouts8.14Logged In Users With No Cart Items8.15Travel From Delhi8.16Unique Sources and Destinations8.17Lowest Paid Employee8.18Pivot the Table8.19Convert All Strings Into Uppercase8.20JOIN Two Tables8.21LEFT JOIN Two Tables8.22Shows Aired on Different Dates8.23Highest Number of Games Played8.24Perfect Square Sales Amount8.25Median Sales Amount
Chapter 9:

What's Next?

9.1Tips And Tricks for SQL Interview9.2Ace Your Interview
Start this Course

Don't just read questions

Solve questions asked in real interviews

Write a query to filter products based on the given conditions.

Consider the following table:

Products

idnameprice
1keyboard250
2mouse175
7headphone150

Task: Select all the products whose price is greater than 160 but less than 180.

Expected Output

The output of the query will be:

idnameprice
2mouse175

Input
sensAI Explanationpowered by OpenAI

Apologies! Unable to fetch data at the moment. Please try again later.

CERTIFICATE OF COMPLETION

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Jane Doe

has successfully completed the course

SQL Interview Questions

Date of Issue:

Certification Code:

SIGNATURE

Founder, Chief Executive Officer

Programiz

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Showcase your expertise on LinkedIn and stand out from the crowd. Impress your potential employers.

CERTIFICATE OF COMPLETION

This is to certify that

Jane Doe

has successfully completed the course

SQL Interview Questions

Date of Issue:

Certification Code:

SIGNATURE

Founder, Chief Executive Officer

Programiz

Feedback from our students

Tanya Giterman
“I explored Programiz PRO and I instantly loved the way SQL was taught. I finished the course quickly and became a star in my bootcamp class. I also got a job because of Programiz PRO.”

Tanya GitermanUSA

Feedback from our students

Tanya Giterman
“I explored Programiz PRO and I instantly loved the way SQL was taught. I finished the course quickly and became a star in my bootcamp class. I also got a job because of Programiz PRO.”

Tanya GitermanUSA

Kranthi Kumar Gajji
“In Programiz PRO, I've found a platform to use for quick revisions, which was difficult before I found it. I use the platform for a quick revision before interviews to refresh all the important concepts in just a couple of hours.”

Kranthi Kumar GajjiUSA

Ayushma Malla Thakuri
“On Programiz PRO, the research work is already done by an expert in the background; all you need to do is focus entirely on your learning. So, the intuitive learning path is extremely useful.”

Ayushma Malla ThakuriNepal

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