Establishing a connection to an SQL database??

[RiskyHunter]

Hi;

Am connecting my Java application to Oracle and i have few questions;

And actually that's my first time working with the database so plz be patient with me ^_^

1) Actually i wanna ask about the database security and what things that it may threat the security of the database, the application that am building is
for dental clinic so i have to establish a connection to a Oracle database on a
specific server.

i think that if the database secure in that server (the server that am gonna add
the data on it), so that means i don't need to do any thing in my code to make the database secure, is that true am not quit sure??


plz help me out i really need to knew more about the database before i submit
the application to the clinic.

thanks in advance.