The solutions to exercises that were solved during the calsses are in the folder Exercises.
Conception of database is in this text file with the documentation for the database being located in this pdf file. Both are written in polish.
The sql codes that create the tables are in this .sql with the results of running this code on virtual machine being in this .txt and lastly a simple program which was employed in order to generate data to fill the tables are to be found in this .R.