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Relational an educational tool to provide a workspace for experimenting with relational algebra, an offshoot of first-order logic.
It provides GUI that can be used for executing relational queries, and also provides a command line interface.
Provides a standalone Python module that can be used for executing relational queries, parsing relational expressions and optimizing them.
Install
Windows installer can be found here: https://code.google.com/p/relational/downloads/list
For Linux, check your distribution's packages, relational is available on Debian and Ubuntu.
Usage
Formal language definition at this link https://github.com/ltworf/relational/wiki/Grammar-and-language
Run from sources
To launch the application, run
./relational_gui.py
If it needs some dependencies: Qt4, Python 2.7, either PyQT4 or Pyside.
It can run on osx but this is not supported.