Relational calculus

Database querying using SQL

Published in Benjamin S. Baumer, Daniel T. Kaplan, Nicholas J. Horton, Modern Data Science with R, 2021

Benjamin S. Baumer, Daniel T. Kaplan, Nicholas J. Horton

The theoretical foundation for SQL is based on relational algebra and tuple relational calculus. These ideas were developed by mathematicians and computer scientists, and while they are not required knowledge for our purposes, they help to solidify SQL’s standing as a data storage and retrieval system.

Database querying using SQL

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Published in Benjamin S. Baumer, Daniel T. Kaplan, Nicholas J. Horton, Texts in Statistical Science, 2017

Benjamin S. Baumer, Daniel T. Kaplan, Nicholas J. Horton

Relational similarity-based model of data part 2: dependencies in data

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Journal Information

Published in International Journal of General Systems, 2018

Radim Belohlavek, Vilem Vychodil

Notice that in the prequel, we used (11) as the interpretation of the unary connective which plays an important role in the model (it is the domain relational calculus counterpart to the relation algebra operation of a kernel).

Relational calculus

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Database querying using SQL

Database querying using SQL

Relational similarity-based model of data part 2: dependencies in data