For practicing SQL queries you can try w3 resources and DataLemur, too. I found them to be better than Leetcode. Answer from noob_reddituser on reddit.com
LeetCode
leetcode.com › studyplan › top-sql-50
SQL 50 - Study Plan - LeetCode
Crack SQL Interview in 50 Qs
LeetCode
leetcode.com › problemset › database
LeetCode - The World's Leading Online Programming Learning Platform
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
Videos
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Solve 20 Leetcode SQL Medium in 2 hours | SQL Interview Practice ...
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Practice SQL Interview Questions on LeetCode | Solve SQL Interview ...
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EASY SQL Leetcode Interview Questions | Practice - YouTube
LeetCode
leetcode.com › problem-list › m8baczxh
Free SQL questions - LeetCode
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
LeetCode
leetcode.com › explore › featured › card › sql-language
SQL Language
LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. No matter if you are a beginner or a master, there are always new topics waiting for you to explore.
Reddit
reddit.com › r/sql › is leetcode a good start to learn the basics and get familiar with the syntax ?
r/SQL on Reddit: Is leetcode a good start to learn the basics and get familiar with the syntax ?
September 2, 2025 -
I’m a second-year university student majoring in Business Intelligence. Our curriculum touches on a bit of everything — software and web development, Python programming, and of course some data manipulation and querying with SQL.
Lately, I’ve been leaning more toward the data side of things and aiming for roles like data engineer, data scientist, or data analyst. A common skill across all of these paths is SQL.
I know that working on real-world projects is the best way to learn, but since we’ve only covered the surface in university, I thought LeetCode might be a good way to strengthen my grasp of SQL syntax and improve my problem-solving skills.
What do you think of this approach? Is it actually helpful, or am I better off focusing on something else?
Top answer 1 of 9
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For practicing SQL queries you can try w3 resources and DataLemur, too. I found them to be better than Leetcode.
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Leetcode doesn't really teach you basics, you're probably better off using sqlbolt to learn absolute basics and then moving on to one of the sites that keep getting advertised on this sub
Reddit
reddit.com › r/dataengineering › what i have learned by solving (almost) all the sql problems in leetcode
r/dataengineering on Reddit: What I have learned by solving (almost) all the SQL problems in Leetcode
April 12, 2023 -
Hello,
I have written my first blog post in medium about what I have learned solving leetcode SQL problems. Shared some tips for those who want to start solving SQL problems too.
Also added some resources in the post which might be beneficial for you.
Happy reading!
https://medium.com/@iamrafiul/what-i-have-learned-by-solving-almost-all-the-sql-problems-in-leetcode-670b8a2cb32e
Top answer 1 of 5
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TL:DR?
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Perhaps a hot take, but I didn't think that Leetcode's SQL questions were as good as their more traditional DS&A questions (at least when working in Python). To be honest, I still feel like there's a gap in the market for a product that focuses on teaching SQL, and particuarly teaching UNIX/Bash/Shell. While Statascratch is good, it lacked some of the edge case functionality that Leetcode has, allowing you to submit solutions that weren't really robust. The UI is also frustrating - tracking problems that I have / haven't completed shouldn't be as hard as it was.
LeetCode
leetcode.com › problems › combine-two-tables
Combine Two Tables - LeetCode
Can you solve this real interview question? Combine Two Tables - Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | personId | int | | lastName | varchar | | firstName | varchar | +-------------+---------+ personId is the primary key (column with unique ...
Reddit
reddit.com › r/sql › is practicing sql questions from leetcode good enough for interviews?
r/SQL on Reddit: Is practicing SQL questions from Leetcode good enough for interviews?
July 1, 2022 -
I have to prepare for interviews and I am using free version of Strata Search and paid version of Leetcode to get the hang of it. Please let me know if that’s enough. My goal is to practice 2-4 medium and hard questions everyday and start giving interviews for next week. Appreciate any tip and help.
Top answer 1 of 10
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It’s a great start and could get you through but also depends on what you plan to do with SQL for a job. I suggest building out a database from scratch with open data sources, going from an ER diagram to database, to dashboard. Thinking about OLAP vs OLTP. Learn about 3NF, ACID, and etc. The reason is that many jobs may not require this as a necessity but your engineers will appreciate the understanding of it. The complications involved of ingesting dirty data and making it available for others to use gets lost in the background easily. I can’t think of a role that wouldn’t benefit some fundamentals of this outside of DDL/DML statements
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Yeah it's okay. But Stratascratch is better.
YouTube
youtube.com › playlist
LeetCode SQL Problems - YouTube
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Medium
medium.com › @maryamtanveer866 › what-i-learned-from-solving-50-sql-problems-on-leetcode-b9aca5ce38b4
What I Learned from Solving 50 SQL Problems on LeetCode | by Maryamtanveer | Medium
April 28, 2025 - If you’re just starting your SQL journey or considering taking on the LeetCode 50 SQL Problems Study Plan, I highly recommend it. It’s a great way to get hands-on experience, and the problems are designed to push you to think critically.
LeetCode
leetcode.com › problems › managers-with-at-least-5-direct-reports
Managers with at Least 5 Direct Reports - LeetCode
Can you solve this real interview question? Managers with at Least 5 Direct Reports - Table: Employee +-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int | | name | varchar | | department | varchar | | managerId | int | +-------------+---------+ id is the primary ...
LeetCode
leetcode.com › discuss › post › 1208129 › list-of-free-leetcode-sql-questions
List of Free Leetcode SQL Questions - Discuss - LeetCode
List of Free Leetcode SQL Questions · Abhishek Singh Baghel · 260298 · May 14, 2021 · May 14, 2021 · Database · https://leetcode.com/problems/big-countries ·
LeetCode
leetcode.com › problems › customers-who-never-order
Customers Who Never Order - LeetCode
Can you solve this real interview question? Customers Who Never Order - Table: Customers +-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int | | name | varchar | +-------------+---------+ id is the primary key (column with unique values) for this table.
LeetCode
leetcode.com › problems › consecutive-numbers
Consecutive Numbers - LeetCode
Consecutive Numbers - Table: Logs ... this table. id is an autoincrement column starting from 1. Find all numbers that appear at least three times consecutively....
YouTube
youtube.com › watch
Solve Leetcode SQL 50 Questions with me | Part 1 | Master SQL for Interviews - YouTube
In this video, I will solve 20 SQL Questions, from Leetcode SQL 50 List, after this video, you will feel yourself equipped with SQL, ready for Placements and...
Published May 5, 2025
LeetCode
leetcode.com › problems › recyclable-and-low-fat-products
Recyclable and Low Fat Products - LeetCode
Recyclable and Low Fat Products ... with unique values) for this table. low_fats is an ENUM (category) of type ('Y', 'N') where 'Y' means this product is low fat and 'N' means it is not. recyclable is an ENUM (category) of types ...
LeetCode
leetcode.com › problems › monthly-transactions-i
Monthly Transactions I - LeetCode
Can you solve this real interview question? Monthly Transactions I - Table: Transactions +---------------+---------+ | Column Name | Type | +---------------+---------+ | id | int | | country | varchar | | state | enum | | amount | int | | trans_date | date | +---------------+---------+ id is ...
LeetCode
leetcode.com › problems › customers-who-bought-all-products
Customers Who Bought All Products - LeetCode
Can you solve this real interview question? Customers Who Bought All Products - Table: Customer +-------------+---------+ | Column Name | Type | +-------------+---------+ | customer_id | int | | product_key | int | +-------------+---------+ This table may contain duplicates rows. customer_id ...
LeetCode
leetcode.com › problems › design-sql
Design SQL - LeetCode
Can you solve this real interview question? Design SQL - Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
Dsfaisal
dsfaisal.com › articles › sql › leetcode-sql-problem-solving
LeetCode SQL Problem Solving Questions With Solutions
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