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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.

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Overview

Content

Reviews

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 to joins and subqueries are provided. After completing this course, you will approach your SQL interview with boosted confidence and the ability to address the interview questions with clarity and precision.

This course will help you prepare for your next SQL coding interview. Various problem statements have been provided to evaluate ...Show More

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

TAKEAWAY SKILLS

SQL

Database

Prepare for Interview

Problem solving

Content

52 Lessons36 Quizzes

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

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Developed by MAANG Engineers

Every Educative resource is designed by our in-house team of ex-MAANG software engineers and PhD computer science educators — subject matter experts who’ve shipped production code at scale and taught the theory behind it. The goal is to get you hands-on with the skills you need to stay ahead in today's constantly evolving tech landscape. No videos, no fluff — just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

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"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."

Software Developer

Carlos Matias La Borde

"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

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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 Mock Interviews

Test your skills in a simulated interview setting. Receive personalized feedback based on your performance. Available for Coding Interviews, System Design, and more.

Adaptive Learning

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AI Code Mentor

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