This is the state of the book (written in English) and the slides (in German language) at the end of the lecture period of Winter Semester 2025 at Hefei University (合肥大学).
There are still some minor issues and typos, especially in the earlier slides, that I do not have the time to search and fix right now.
Attached to this release, you can find the file databases_2025_12_12.tar.xz, which is an archive with all the PDF documents and the example source files.
You can download and extract it either with tar or WinRar or some other tools.
This is much easier than downloading all slides and the book one-by-one.
But of course, if you download them one-by-one, you get the latest version.
The file databases_sources_2025_12_12.tar.xz contains the complete sources of the book, the German slides, the shared basics packages, and some tools that I developed for building the book and the slides.
This may not be useful for you, but for me it is basically a backup.
Of course, both files are only representing this very state in time.