Rextester - some online tools for anyone who finds them useful. It was started as online .net regex tester. Rextester stands f ...

SQLZoo includes tutorials and reference to support people learning SQL. It features:

• Interactive access to several SQL engine ...

An online tool for testing, demonstrating and sharing database commands and scripts.

An online tool for testing, sharing and collaborating on SQL snippets. Supports MySQL PostgreSQL and SQLite database engines.

ideone.com is a... pastebin. But a pastebin like no other on the Internet. More accurate expression would be "online mini IDE ...