Lecture notes from Stanford professor Jennifer Widom's online mini-courses about relational algebra and SQL. The notes were made in Jupyter running a Python 2 kernel with SQL magic. Code cells view ...

This post continues the series from the Adjoint School of Applied Category Theory 2022. It is a summary of the main ideas introduced in this paper: Filippo Bonchi, Dusko Pavlovic and Pawel Sobocinski, ...

As data analytics has become an important application for modern data management systems, a new category of data management system has appeared recently: the scalable linear algebra system. We argue ...

(a) Consider again Question 3 in Tutorial 1 (Challenge) to find the restaurants that sell all the pizzas that Maggie likes and don’t sell any pizza that Ralph likes. Write a relational algebra ...

Abstract: Imprecision and uncertainty in data values are pervasive in real-world environments and have received much attention in the literature. Several methods have been proposed for incorporating ...

Abstract: Relational database model, as one of the most commonly used database models, is defined by the structure used for the storing of data, methods of data manipulation and so called data ...