It is a Bad Thing to store multiple values in a single column or variable.
I'm not storing all the values in a single variable.
vector is nothing but a set of values in cpp.
Here the values in vector v are 12,13 & 14.
Just like collection or list.
Ah, the it's the classic 'Varying In-List' again
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:110612348061 (started more than a decade ago, so scroll down for more recent examples)