Home>Courses>SQL Interview Preparation

SQL Interview Preparation

The ultimate guide to SQL interviews. Practice with real-world interview questions developed by FAANG engineers. Prep faster with CRUD queries, SQL functions, and challenging joins/subqueries. Get interview-ready in hours.

Beginner

52 Lessons

Certificate of Completion

AI-POWERED

Mock Interview

Explanations

AI-POWERED

Mock Interview

Explanations

This course includes

161 Playgrounds

36 Quizzes

Course Overview

What You'll Learn

Course Content

Recommendations

Course Overview

This course will help you prepare for your next SQL coding interview. Various problem statements have been provided to evaluate your knowledge and learn to write perfect queries quickly. The course starts with interview questions on basic CRUD queries. Afterward, interview questions involving different SQL functions, including aggregate and date and time functions, are posed. Then, questions related to data grouping and sorting are presented. Toward the end of the course, more challenging questions related...Show More

TAKEAWAY SKILLS

SQL

Database

Prepare for Interview

Problem solving

What You'll Learn

An understanding of interview questions regarding SQL

Hands-on exercises to practice your skills

The ability to solve coding problems with different techniques

Familiarity with different SQL functions

A working knowledge of combining SQL queries

An understanding of interview questions regarding SQL

Course Content

Get Started

1 Lessons

Get familiar with SQL interview questions and hone query writing skills through exercises.

Introduction

CRUD Operations

6 Lessons

Unpack the core of inserting, updating, and deleting records in SQL.

Question: Insert a Record

Answer: Insert a Record

Question: Update a Value

Answer: Update a Value

Question: Delete a Record

Answer: Delete a Record

Aggregate Functions

8 Lessons

Examine SQL aggregate functions for summing, averaging, finding minimum/maximum values, and counting records.

Question: Aggregate Records Using SUM

Answer: Aggregate Records Using SUM

Question: Aggregate Records Using AVG

Answer: Aggregate Records Using AVG

Question: Aggregate Records Using MIN/MAX

Answer: Aggregate Records Using MIN/MAX

Question: Aggregate Records Using COUNT

Answer: Aggregate Records Using COUNT

Date and Time Functions

4 Lessons

Grasp the fundamentals of extracting, formatting, and calculating date and time values in SQL.

Question: Extract a Value From a Date

Answer: Extract a Value From a Date

Question: The DATE Column and Calculations

Answer: The DATE Column and Calculations

Filtering

4 Lessons

Solve problems in filtering SQL records using WHERE and LIKE clauses effectively.

Question: Filter with the WHERE Clause

Answer: Filter with the WHERE Clause

Question: Filter with the LIKE Operator

Answer: Filter with the LIKE Operator

Grouping

4 Lessons

Follow the process of grouping data using SQL GROUP BY with aggregate functions.

Question: The GROUP BY Clause and the AVG Function

Answer: The GROUP BY Clause and the AVG Function

Question: The GROUP BY Clause and the SUM Function

Answer: The GROUP BY Clause and the SUM Function

Sorting

4 Lessons

Practice using SQL sorting commands, filtering, aggregation, and handling NULL values.

Question: Sorting the Records

Answer: Sorting the Records

Question: Sorting and Calculations

Answer: Sorting and Calculations

Constraints

8 Lessons

Step through SQL constraints, ensuring data integrity with NOT NULL, UNIQUE, PRIMARY, and FOREIGN KEY constraints.

Question: The NOT NULL Constraint

Answer: The NOT NULL Constraint

Question: The UNIQUE Constraint

Answer: The UNIQUE Constraint

Question: The PRIMARY KEY Constraint

Answer: The PRIMARY KEY Constraint

Question: The FOREIGN KEY Constraint

Answer: The FOREIGN KEY Constraint

Working with JOINs

8 Lessons

Get started with mastering SQL JOIN operations to combine and retrieve data across multiple tables.

Question: Using LEFT JOIN

Answer: Using LEFT JOIN

Question: Using RIGHT JOIN

Answer: Using RIGHT JOIN

Question: Using INNER JOIN

Answer: Using INNER JOIN

Question: Combining JOIN Statements

Answer: Combining JOIN Statements

10.

Subquery

4 Lessons

Break apart essential subquery techniques and calculations for effective SQL querying.

Question: Subquery in the SELECT Clause

Answer: Subquery in the SELECT Clause

Question: Subquery and Calculations

Answer: Subquery and Calculations

11.

Final Remarks

1 Lessons

Grasp the fundamentals of SQL interviews, key topics, and advanced database concepts.

Conclusion

Trusted by 2.5 million developers working at companies

"These are high-quality courses. Trust me. I own around 10 and the price is worth it for the content quality. EducativeInc came at the right time in my career. I'm understanding topics better than with any book or online video tutorial I've done. Truly made for developers. Thanks"

Anthony Walker

@_webarchitect_

"Just finished my first full #ML course: Machine learning for Software Engineers from Educative, Inc. ... Highly recommend!"

Evan Dunbar

ML Engineer

"You guys are the gold standard of crash-courses... Narrow enough that it doesn't need years of study or a full blown book to get the gist, but broad enough that an afternoon of Googling doesn't cut it."

Carlos Matias La Borde

Software Developer

"I spend my days and nights on Educative. It is indispensable. It is such a unique and reader-friendly site"

Souvik Kundu

Front-end Developer

"Your courses are simply awesome, the depth they go into and the breadth of coverage is so good that I don't have to refer to 10 different websites looking for interview topics and content."

Vinay Krishnaiah

Software Developer

"I've tried probably 5-7 different sites and Educative is easily the best. It perfectly blends explanation with interactivity"

Eric Downs

Musician/Entrepeneur

Hands-on Learning Powered by AI

See how Educative uses AI to make your learning more immersive than ever before.

Instant Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

AI-Powered Mock Interviews

Put your skills to the test in a simulated interview setting. Receive personalized feedback based on your performance. Available in Premium & Premium Plus plans.

Adaptive Learning

At various checkpoints throughout Educative courses, you will be prompted to take a quick assessment. Receive a condensed curriculum tailored to your strengths and skill gaps.

Explain with AI

Select any text within any Educative course, and get an instant explanation — without ever leaving your browser.

AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

Recommended before starting this course

Course

Learn SQL from Scratch

Gain insights into SQL, explore fundamental and advanced keywords, and learn to manage tables, building a solid foundation through hands-on projects without complex programming.

beginner

10 hours

Course

An Introductory Guide to SQL

Gain insights into SQL by exploring database creation, data manipulation, and advanced queries. Learn about practical applications and practice for SQL interviews to build confidence and readiness.

beginner

13 hours

Course

Getting Started with SQL and Relational Databases

Gain insights into using SQL for relational databases. Learn about creating, editing, and managing tables with MySQL, creating indexes, complex queries, and joining tables for optimized data retrieval.

beginner

9 hours 40 mins

Course

Learn SQL from Scratch

beginner

10 hour

Course

An Introductory Guide to SQL

beginner

13 hour

Course

Getting Started with SQL and Relational Databases

beginner

9 hour 40 min

Related Courses and Skill Paths

Course

SQL Antipatterns: Avoiding the Pitfalls of Database Programming

Discover common SQL antipatterns, their pitfalls, and solutions. Gain insights into logical, physical, query, and application antipatterns. Learn about effective, risk-free database practices.

beginner

6 hours 45 mins

Course

The Art of PostgreSQL

Gain insights into PostgreSQL's robust features and high performance. Learn about SQL integration, data types, and extensions with hands-on code examples for practical application.

advanced

65 hours

Course

SQL Antipatterns: Avoiding the Pitfalls of Database Programming

beginner

6 hour 45 min

Course

The Art of PostgreSQL

advanced

65 hour

Free Resources