leetcode sql certification - Brave Search

Is practicing SQL questions from Leetcode good enough for interviews?

reddit.com › r › SQL › comments › wdfoyk › is_practicing_sql_questions_from_leetcode_good

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 Answer from chaoscruz on reddit.com

leetcode.com › studyplan › top-sql-50

SQL 50 - Study Plan - LeetCode

Crack SQL Interview in 50 Qs · SQL 50 · Summary · Basic to intermediate SQL topics · 50 essential SQL questions · Best for 1 month of prep time · Award · SQL 50 · Complete the study plan to win the badge!

leetcode.com › explore › featured › card › sql-language

Explore - LeetCode

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.

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leetcode.com › studyplan › premium-sql-50

Advanced SQL 50 - Study Plan - LeetCode

50 Advanced SQL Problems · Advanced SQL 50 · Summary · Basic to advanced SQL topics · 50 high-frequency SQL questions · Best for 1 month of prep time · Award · Advanced SQL 50 · Complete the study plan to win the badge!

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.

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

Yeah it's okay. But Stratascratch is better.

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.

kawsar34.medium.com › leetcode-sql-50-part-1-8b76ed9ee193

Leetcode SQL 50 Part 1. SQL, or Structured Query Language, is… | by Shahidullah Kawsar | Medium

February 10, 2024 - I aim to equip readers with the knowledge and confidence to tackle SQL challenges, enhancing their data management proficiency and problem-solving acumen. LeetCode has launched a study plan “SQL 50”, with 50 questions to practice your SQL skills.

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.com › discuss › general-discussion › 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 ·

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github.com › mrinal1704 › SQL-Leetcode-Challenge

GitHub - mrinal1704/SQL-Leetcode-Challenge: Contains all the 117 Leetcode questions with their solutions ranging from Easy to Hard in MySQL.

I attempted all questions in 25 days to corroborate my knowledge in SQL. The solutions are divided into three level of categories namely Easy, Medium, and Hard. Every category first contains the question and then followed by its respective solution. Link to the website is: https://leetcode.com/problemset/database/

Starred by 815 users

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Languages TSQL

leetcode.com › discuss › general-discussion › 2064076 › list-of-all-free-45-sql-leetcode-questions-easy-medium-hard

✅ List of All Free 45 SQL Leetcode questions - (Easy, Medium, ...

Clone it !! list : https://leetcode.com/list/e97a9e5m Upcoming post 🔥: All SQL Leetcode questions with their most intuitive solutions. ---- T

reddit.com › r/sql › for those wanting to practice sql on leetcode but don’t have a lc subscription, i created a python program that re-creates all the problems in db-fiddle.com

r/SQL on Reddit: For those wanting to practice SQL on LeetCode but don’t have a LC subscription, I created a Python program that re-creates all the problems in db-fiddle.com

December 24, 2018 -

I’m not sure how many people in this sub use Python, but I wanted to share this program because it allowed me to practice all 125 LeetCode (LC) database/SQL problems in an efficient way.

Background- the two problem I wanted to solve:

Majority of SQL problems on LC are locked
Even with access to the problem, creating the query can be challenging without being able to test and output the intermediate queries that make up the final solution.

My initial solution was manually copying and pasting the tables from LC to db-fiddle.com, but then I thought, there must be a better way- that is how this program was conceived.

What this Python program does:

Using the web automation package Selenium, it opens the LC problem selected by the user, parses the table data, and creates the table schema in db-fiddle so that you can test your queries. Additionally, it saves all the db-fiddles you've been working on in case you want to continue working on them in future sessions.

Sample outputs (for question #1369):

problem statement tab: https://leetcode.jp/problemdetail.php?id=1369

db-fiddle tab: https://www.db-fiddle.com/f/oMDnFch8BXL45r3dUVF17V/0

solutions tab: https://github.com/kamyu104/LeetCode-Solutions/blob/master/MySQL/get-the-second-most-recent-activity.sql

Demo and GitHub link:

Check it out on GitHub: https://github.com/jjjchens235/leetcode-sql-unlocked

Not to be a spoil sport, but it could probably be construed as copyright infringement.

Just thought I'd mention it in case you're concerned about that sort of thing.

I was browsing leetcode sql problems 10 seconds ago and was thinking like most of them are locked and this post popped up.

linkedin.com › posts › eczachly_please-stop-just-grinding-leetcode-to-learn-activity-7333533228516917248-1XAO

Please stop just grinding Leetcode to learn SQL. You need ...

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sqlpad.io › leetcode-alternative-sql

Leetcode Alternative for Data Scientist SQL Interview

Leetcode has undoubtedly excelled in preparing software engineers for coding interviews, and now SQLPad brings that same focus to data science and data analytics candidates prepping for SQL coding interviews.

dsfaisal.com › articles › sql › leetcode-sql-problem-solving

LeetCode SQL Problem Solving Questions With Solutions

Post displaying LeetCode sql problem solving questions and solution.

liambx.com › blog › platforms to practice sql: level up your database skills

Platforms to Practice SQL: Level Up Your Database Skills - Liam ERD

December 4, 2025 - SQL Practice and Certification The platform offers hundreds of SQL practice problems and official skills certification tests, covering basic to advanced concepts.

github.com › ieshreya › sql-50-leetcode

GitHub - ieshreya/sql-50-leetcode: Solutions for SQL 50 Study Plan on LeetCode

Solutions for SQL 50 Study Plan on LeetCode · 1757 - Recyclable and Low Fat Products · SELECT product_id FROM Products WHERE low_fats = 'Y' AND recyclable = 'Y' 584 - Find Customer Referee · SELECT name FROM Customer WHERE referee_id != 2 OR referee_id IS null ·

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leetcode.com › studyplan

Study Plan - 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.

stratascratch.com › blog › how-to-use-leetcode-for-data-science-sql-interviews

How To Use LeetCode For Data Science SQL Interviews - StrataScratch

September 29, 2023 - In a data science coding interview, you’re asked to manipulate data and communicate insights from the data, so there’s often a coding portion that tests your ability to do so. You can usually use any coding language you’re comfortable with but the most popular ones are SQL, Python, and R. LeetCode’s questions are more tailored towards algorithms where you’re tasked to search through arrays and return specific values.

kaggle.com › questions-and-answers › 350791

Sources for Mastering SQL

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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

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.