I am having a table with 2 columns.

---

id: number,
name : varchar(50)

---

I want to insert oxygen (O2) value in name field, 2 as subscript.
when i am inserting, it is not able to save it as subscript value.

one solution is to change name's data type to nvarchar.
but i am looking for better solution, So that i do not need to change in table.