Dev tools · alternatives · 2026
24 alternatives to DataLemur – Ace the SQL Interview!
I just launched a new free SQL practice platform today called DataLemur! I'm the author of Ace the Data Science Interview, and a lot of our readers wanted to practice the SQL questions from the book, so we decided to make DataLemur free and open! Even if you aren't job hunting, these tricky SQL questions are pretty fun to practice on.
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… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. DataLemur – Ace the SQL Interview! launched in 2022; newer entries below may have overtaken it.
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The text-based SQL learning game for data scientists and marketers
2023 · lost-at-sql.therobinlord.com · its alternatives →
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Stop treating the database as dumb storage and use its extended features. There's a lot you can use.
2022 · sqlfordevs.com · its alternatives →
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I have spent large parts of the last 10+ years building an SQL Editor. The tool is targeted at data analysts, a lot of effort has gone into charting, visualizing and excel export. If this sounds useful to you, it's Free, please give it a try and let me know any feedback.
2024 · timestored.com · its alternatives →
- 4SS
2018 · selectstarsql.com · its alternatives →
- 5ST
2018 · app.bytescout.com · its alternatives →
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Paste in my prompt to Claude Code with an embedded API key for accessing my public readonly SQL+vector database, and you have a state-of-the-art research tool over Hacker News, arXiv, LessWrong, and dozens of other high-quality public commons sites. Claude whips up the monster SQL queries that safely run on my machine, to answer your most nuanced questions. There's also an Alerts functionality, where you can just ask Claude to submit a SQL query as an alert, and you'll be emailed when the ultra nuanced criteria is met (and the output changes). Like I want to know when somebody posts about…
Dec 2025 · exopriors.com · its alternatives →
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SQL Workbench▲186In-browser SQL Workbench for data querying & visualization
2024 · sql-workbench.com · its alternatives →
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Free browser-based SQL editor powered by DuckDB. Query and visualize CSV, JSON, Parquet and Arrow files locally or from remote URLs. No installation required.
2024 · sql-workbench.com · its alternatives →
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I have been working on SQL Explorer, an open source, Django-based reporting and query tool for (gulp!) almost ten years. It's a tool that fits just right for me and many others, and I love and use almost every day. Write SQL, share results, do some analysis, get insight. No surprises. A live demo instance is here (no login or anything required): https://demo.sqlexplorer.io/ And here's a fairly unprofessional, but very enthusiastic, video tour: https://sql-explorer.s3.amazonaws.com/Sql+Explorer+5.mp4 The UI is constrained enough that there's very little to learn,…
2024 · github.com · its alternatives →
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Hi HN community. We are excited to open source Dataherald’s natural-language-to-SQL engine today (https://github.com/Dataherald/dataherald). This engine allows you to set up an API from your structured database that can answer questions in plain English. GPT-4 class LLMs have gotten remarkably good at writing SQL. However, out-of-the-box LLMs and existing frameworks would not work with our own structured data at a necessary quality level. For example, given the question “what was the average rent in Los Angeles in May 2023?” a reasonable human would either assume the…
2023 · github.com · its alternatives →
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Master SQL interview skills in weeks, say goodbye to nerves.
2020 · sqlpad.io · its alternatives →
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- 14IC
2020 · platform.stratascratch.com · its alternatives →
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Portable, Serverless & Lightweight SQLite-based Graph Database in Arturo - drkameleon/grafito
2021 · github.com · its alternatives →
- 17DA
I built DataRamen, a local-first SQL explorer that helps you get the data you need fast, without writing repetitive queries every time. You run it locally from the CLI (no cloud version yet), connect your databases, and you're ready to go. The goal is to let you explore and query data like you would in a spreadsheet: intuitive, fast, and without friction. Key features: - Automatic joins & related data navigation: Right-click any row to instantly see related records in other tables (based on foreign keys or references). - Keyboard-driven UI: Hit N to jump to a table, F to filter, and so on,…
2025 · dataramen.xyz · its alternatives →
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SnapQL is an open-source desktop app (built with Electron) that lets you query your Postgres database using natural language. It’s schema-aware, so you don’t need to copy-paste your schema or write complex SQL by hand. Everything runs locally — your OpenAI API key, your data, and your queries — so it's secure and private. Just connect your DB, describe what you want, and SnapQL writes and runs the SQL for you.
2025 · github.com · its alternatives →
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Learning to pass the Google interview? Master data structures, algorithms, and system design with interactive visualizations, a code playground, and AI feedback.
Sep 2026 · learningto.co · its alternatives →
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Visualize and analyze database query execution plans for PostgreSQL, MySQL, SQL Server, and MongoDB to optimize performance, brought to you by Datadog.
Jan 2026 · explain.datadoghq.com · its alternatives →
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Hey HN, We are excited to announce that we’ve open-sourced AGX, a fast and lightweight data explorer for ClickHouse. It is designed for developers and analysts who want to leverage SQL-native querying in an IDE-like environment. Here’s what makes AGX stand out: - Built on ClickHouse (accessible via embedded chdb or remote instance). - IDE-like user interface: features tabs, a Monaco editor, and a fast keyboard workflow. - Zero setup required: no infrastructure or complex dashboards to manage. - Ideal for exploring live blockchain data, while also flexible enough for general ClickHouse usage…
2025 · github.com · its alternatives →
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Practice real data engineering interviews, for free.
Apr 2026 · datadriven.io · its alternatives →
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Hey HN, I just spent the last few weeks building a database for agents. Over the last year I built PostHog AI, the company's business analyst agent, where we experimented on giving raw SQL access to PostHog databases vs. exposing tools/MCPs. Needless to say, SQL wins. I left PostHog 3 weeks ago to work on side-projects. I wanted to experiment more with SQL+agents. I built an MVP exposing business data through DuckDB + annotated schemas, and ran a benchmark with 11 LLMs (from Kimi 2.5 to Claude Opus 4.6) answering business questions with either 1) per-source MCP access (e.g. one Stripe…
Apr 2026 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →