"SUBD" to work with the database of mythological characters.

The work was done by the customer:
The theme is “Mythological Characters”. As a database I chose the Oracle Database. I have my own targeted model of such a base, but if so, you can change what you think is targeted. The program must, connecting to the database, have the ability to add and remove substances from the tables, be able to do the search for substances by the chosen column (i.e. I choose for example to search for a hero by name and enter the name field) and draw the meaning of their lines (i.e. all information about the found substance). The program should also be able to examine the content of all tables. In the requirements there is another condition that it should be related to mathematical processing. Here you can do the following: make such a menu extra where you choose some Foreign Key related to the hero table and you show how many percent of the heroes have such Foreign Key.

Working with Oracle DataBase, Java, JavaFX, Maven, JDBC.