In this repository, we will be releasing the upcoming book “Principles of Databases”, by Marcelo Arenas, Pablo Barcelo, Leonid Libkin, Wim Martens, and Andreas Pieris. The book will be about the foundational and mathematical principles of databases in its various forms.

• We planned the book such that large parts of it are suitable for teaching. A chapter roughly corresponds to the contents of a single lecture.

• For the ease of teaching and understanding the material, we may sometimes cut corners. If we want to give the reader a relatively quick insight of a particular result, this sometimes means that we present a weaker form of the result than the most general result known in the literature. We have been teaching from this book ourselves, but the present version will undoubtedly still have errors. If you find some, you can open an issue on Github and we will look into it.

Please let us know if you find any errors in the book, or places that you find particularly unclear. The new versions of the book, including corrections, will be published in this repository.

Exercise suggestions are also very welcome. We have generated some initial ideas for exercises, but we are aware that the exercises for the currently released parts still needs work. We also plan to accompany each part with bibliographic remarks.

Rendering large PDF documents can be problematic on Github. Some browsers only show the first 250 pages. If you want a full copy of the current version of the book, please download the full pdf file.

To cite this work in a publication please use the following:

@book{ABLMP21,
	author = {Marcelo Arenas and Pablo Barcel\'o and Leonid Libkin and Wim Martens and Andreas Pieris},
	title =	 {Database Theory},
	publisher = {Open source at \url{https://github.com/pdm-book/community}},
	year = {2022},
}