Legal
Open Source Licenses
Last updated: September 24, 2026
SQL Practice is built on open-source work by other people. This page lists what the site ships to your browser, who made it, and the terms it is used under. The licences below require that their copyright notices travel with the software, and this page is where they travel; SQLite, which is in the public domain, asks for nothing, and is credited here anyway.
Everything else on this site — the tutorials, the practice exercises and their solutions, the sample database, and the interface code — is our own original work.
SQLite
The database engine that runs every query on this site, inside your own browser. Version 3.49.1, compiled
to WebAssembly by the sql.js project below and served from
/assets/sql-wasm.wasm.
- Copyright
- None claimed: its authors have dedicated SQLite to the public domain
- Licence
- Public domain (SQLite’s copyright statement)
- Project
- sqlite.org
sql.js
The project that compiles SQLite to WebAssembly and supplies the JavaScript through which this site’s
query worker talks to it. Version 1.14.2, served from
/assets/sql-wasm.js
and
/assets/sql-wasm.wasm
exactly as the project publishes them; the only change is a one-line comment at the top of
sql-wasm.js naming the version and licence.
- Copyright
- Copyright (c) 2017 sql.js authors (named in the project’s AUTHORS file)
- Licence
- MIT License
- Project
- sql.js.org, source at github.com/sql-js/sql.js
Tailwind CSS
The CSS framework this site's styling is built from. Compiled ahead of time into
/assets/site.css;
no Tailwind JavaScript runs in your browser.
- Copyright
- © Tailwind Labs, Inc.
- Licence
- MIT License
- Project
- tailwindcss.com
Inter
The typeface used for all body and heading text. Self-hosted from
/assets/fonts/
rather than loaded from a font CDN, so your browser does not contact a third party to render this page.
- Copyright
- © The Inter Project Authors (Rasmus Andersson and contributors)
- Licence
- SIL Open Font License 1.1
- Project
- rsms.me/inter
JetBrains Mono
The monospaced typeface used for SQL code, the query editor and result tables. Also self-hosted from
/assets/fonts/.
- Copyright
- © The JetBrains Mono Project Authors (JetBrains s.r.o.)
- Licence
- SIL Open Font License 1.1
- Project
- jetbrains.com/lp/mono
Pyodide
The Python runtime behind the Python playground, lessons and exercises: CPython compiled to WebAssembly, served from
/assets/vendor/pyodide-314.0.7/
and loaded only on pages where you run Python.
- Copyright
- © 2019–2025 Pyodide contributors
- Licence
- Mozilla Public License 2.0 (text). The files are redistributed unmodified from the
pyodidenpm package, version 314.0.7; their source code is available at github.com/pyodide/pyodide (tag 314.0.7). - Project
- pyodide.org
CPython
The Python interpreter and standard library inside Pyodide (Python 3.14).
- Copyright
- Copyright © 2001 Python Software Foundation; All Rights Reserved
- Licence
- Python Software Foundation License Version 2 (text). Distributed unmodified inside Pyodide; source at github.com/python/cpython.
- Project
- python.org
TypeScript
The TypeScript compiler, which turns TypeScript into JavaScript inside your browser on the TypeScript playground and
exercise pages. Version 5.9.3, served from
/assets/vendor/typescript-5.9.3/.
- Copyright
- © Microsoft Corporation
- Licence
- Apache License 2.0 (text)
- Project
- typescriptlang.org
About the MIT License
sql.js and Tailwind CSS are both distributed under the MIT License. It permits anyone to use, copy, modify and distribute the software, including commercially, on the condition that the copyright notice and permission notice are preserved. The software is provided "as is", without warranty of any kind, and its authors are not liable for any claim or damages arising from its use. The permission notice reads the same in both projects’ licence files:
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
About the SIL Open Font License
Inter and JetBrains Mono are both distributed under version 1.1 of the SIL Open Font License. It permits the fonts to be used, studied, modified and redistributed freely, including bundled with a website as they are here. The fonts may not be sold on their own, and any modified version may not use the original reserved font name. The fonts are provided without warranty of any kind.
No longer shipped
Until September 2026 the site ran its queries on AlaSQL (© Andrey Gershun & Mathias Wulff, MIT License). SQLite replaced it, and it is no longer sent to your browser.
Something missing?
If you believe something we ship is not credited correctly here, please tell us and we will fix it. Contact details are on the About page.