Solving "SQL Practice Problems" by Sylvia Moestl Vasilik

For work-related tasks I often need to extract data from a database by means of SQL queries. Although the effort involved in extraction is generally low most of the time, I am curious about the more advanced SQL queries. Moestl Vasilik’s book contains some of these more advanced exercises. Also, there are solutions provided by Moestl Vasilik, so writing up my own is not really necessary. Nevertheless, it is still useful because there often is more than one solution approach.

Solutions:

$\color{orange} 29 / 57$ problems solved