rdbms-playground is a cross-platform terminal app for learning relational database concepts - tables, columns, primary and foreign keys, relationships, indexes, queries, and query plans - in a safe sandbox. It's a teaching tool, not a database administration tool: it meets beginners with guided, keyword-based commands (simple mode) and grows with them to raw SQL (advanced mode), so the same playground works from "what is a primary key?" through to writing real queries and reading their execution plans.
Publisher’s description
What is RDBMS Playground?
RDBMS Playground is an open-source education program for Windows from Lazy Evaluation Ltd.
Installation and requirements
Official installers exist for 64-bit and ARM64 as Portable. The main installer is 11.1 MB. It runs without installation (portable).
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Portable: runs without installation
- Small download (11.1 MB)
In short: RDBMS Playground is an open-source education tool for 64-bit and ARM64 PCs.
Is RDBMS Playground safe to download?
- The file is served by git.lazyeval.net, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
0226A9D27699EF175821E7C1A81B46108ADCED60ECCEF670B5206675328EC4D1· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.2.0Latest | June 17, 2026 | 11.1 MB | 64-bit PortableARM64 Portable |
Install from the command line
Silent install ›winget install --id LazyEvaluation.RdbmsPlayground -eProgram files (.exe): rdbms-playground.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Lazy Evaluation Ltd
- Category
- Education
- Licence
- MIT OR Apache-2.0
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64
- Installer
- Portable
- Version
- 0.2.0
- Released
- June 17, 2026
- Added to the catalogue
- July 6, 2026
- Versions listed
- 1
- Website
- relplay.org
- winget ID
- LazyEvaluation.RdbmsPlayground
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is RDBMS Playground free?
Yes. RDBMS Playground is open-source software under the MIT OR Apache-2.0 licence.
Is RDBMS Playground safe to download?
The download comes from git.lazyeval.net, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install RDBMS Playground with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does RDBMS Playground run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Can I use RDBMS Playground without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to RDBMS Playground?
Anki, Praat, OpenBoard, Tux Paint and eXeLearning. The alternatives page compares them.
