SQL To Search Exist Or Not Exist Data

Hello all,

I have a branch a data, now i need to search through a database to check whther it is exist in that database or not, any syggestion?
Example:

Now i have data 123, 234, 345. Let say data 123 and 234 is exist in that database, but data 345 is not exist in that database.

What SQL am i suitable to use to get those result exist(123, 234) and those result not exist (345)?

The database structure is someting like this:
ID NAME O_NAME
-- ----- --------
1 120 123
2 234 234
3 345 345

1) The data consider 'exist' if it exist in column NAME or column O_NAME (either one).

2) The data consider 'not exist' if it not exist in neither NAME column nor O_NAME column

After the SQL query, someting is expected:

Exist:

ID NAME O_NAME
-- ----- --------
1 120 123
2 234 234

Not Exist:

ID NAME O_NAME
-- ----- --------
3 345 345

I'll appreciate if anyone can provide me a solution..Thanks!