Relational an educational tool to provide a workspace for experimenting with relational algebra.

It provides GUI that can be used for executing relational queries, and also a command line interface and a Python library.

Install

apt-get install relational	Download setup	Download sources

Tutorial

Syntax

These are some valid queries

A ∪ B
A ∩ B
A ⋈ C
σ (age==12) (A)
π name,age (A)
ρ age➡a,name➡n (A)
A ∪ B ∪ σ id==3 (C)

Explaination of all the operators and their syntax can be found here.

Formal language definition can be read here.

Documentation on how the automatic casting is performed.

Used by

• Ontology-Based Identification of Research Gaps and Immature Research Areas