SQLPad offers 230+ SQL, Python, and R interview questions, courses, and AI mock interviews for data roles. Plans start at $79/month billed quarterly.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
SQLPad is an online platform for practicing technical interview questions in SQL, Python, and R. It is built for people applying to data roles and centers on a bank of more than 230 interview-style coding questions that run against realistic business datasets.
The company was founded by Leon Wei. According to its About page, it began with a SQL course in 2021, added Python and Pandas content in 2022, and has offered AI career tools from 2023 onward.
Users browse questions by SQL operation, difficulty, or company, then open a question that shows the prompt, table schemas, sample data, and sample results. Code is written and run in the browser using Postgres, MySQL, Python, or R, with Ctrl + Enter to run and Ctrl + S to submit.
After submitting, the page indicates whether the answer is correct. Each question also has an official solution with a written explanation. Visitors can try a sample question on the homepage without logging in.
The core is the question bank, with company sets for more than 20 employers, including Airbnb, Amazon, Google, Netflix, and Uber. Playgrounds for Postgres, MySQL, Python, and R let users write queries and scripts against business tables. Courses cover SQL, Python Pandas, and machine learning fundamentals.
Learners earn tiered certificates after solving enough questions, and a public leaderboard ranks users by points. The AI plan adds an AI Mock Interview, an AI Resume Optimizer, an AI Resume Builder, and AI-generated cover letters and career templates.
SQLPad is an online interview-prep platform for data roles. It offers 230+ SQL, Python, and R coding questions, in-browser playgrounds, courses, certificates, and AI tools for mock interviews, resumes, and cover letters.
With quarterly billing, plans cost $79/month for SQL & R, $99/month for Python, and $149/month for AI. Annual one-time passes cost $599, $799, and $999. Higher list prices of $99, $129, and $199 per month are shown for the non-quarterly option.
SQLPad offers a free tier with 10 SQL and Python coding questions. After that, the account is locked until the user upgrades to a paid plan. A sample question can also be run on the homepage without signing up.
SQLPad provides practice engines for Postgres, MySQL, Python, and R. The SQL & R plan covers Postgres, MySQL, and R, and the Python plan adds Python tracks and machine learning interview prep.
No. Once a monthly, quarterly, or one-time purchase starts, SQLPad does not issue refunds. Subscribers can cancel and keep access until the end of the period they have paid for.
Yes. SQLPad sells annual passes with a single payment for 12 months of access and no recurring charges. The site says they save up to 70% compared with monthly billing.
According to SQLPad's FAQ, it takes about 3 to 4 months on average to finish all the coding questions.
SQLPad says many customers have had subscriptions reimbursed by their employers. The site provides a sample invoice and a draft email to help request reimbursement. It also offers team and bootcamp pricing by quote.