Question : How to insert Greek characters to Oracle table ?

I've a website which user will be inputing Greek characters. And now the problem is how to store these characters in Oracle table ? It that something to do with the NLS_Lang setting ? If so, will it override the previous setting as I will need to support not only Greek language.

Answer : How to insert Greek characters to Oracle table ?

Pls. read my comment carefully

These data types can be used to store data in different languages.

You can store data in multiple languages in the same column if you use nchar or nvarchar2. Ofcourse, if you are using 7.3 you cannot do this. Infact you cannot have data stored in two different languages in the same database with 7.3.