DataLemur – Ace the SQL Interview!

In plain words

DataLemur is a free SQL practice platform designed to help users prepare for technical interviews and improve their SQL skills. It features practice questions drawn from "Ace the Data Science Interview," a book by the platform's creator. The platform is open to anyone interested in working through challenging SQL problems, whether they are actively job hunting or simply looking to sharpen their skills.

written from the facts on this page · September 2026

From the sources

Practice SQL Interview Questions & Data Science Interview Questions asked by FAANG. Made by Nick Singh, Best-Selling Author of Ace the Data Science Interview.

Practice SQL Interview and Data Science Interview questions on DataLemur. Made by Nick Singh, Best-Selling Author of Ace the Data Science Interview Hi, I’m Nick Singh! Before I made DataLemur, I used to write SQL queries and run A/B tests all day at Facebook , and before that, wrote Python on G o o g l e Nest's Data Infrastructure Team. I know first-hand how difficult Data Science, Data Analyst, & Data Engineering interviews can be. While my best-selling book, Ace the Data Science Interview , has successfully helped 16,000+ readers prepare for the Statistics, ML, and Business-Sense portions of data interviews, readers kept asking for a more interactive way to practice the 201 questions from…from datalemur.com

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