Basic update

Question

sql server 2008
I am confused by sql server. I have a table called iso_country_code that was imported from excel.Sql Server has changed the name to iso_country_code$. 
Now I want to update a field and this sql is not working (invalid object name for table name is the error).
UPDATE iso_country_code$
SET Country = 'Afhanistan'
WHERE Name = 'hanistan'
I Have tried the following and still getting the same error. What am I doing wrong?
UPDATE dbo.iso_country_code$
UPDATE [dbo].[iso_country_code$]
UPDATE [dbo].[iso_country_code]
UPDATE iso_country_code
t

Answer 1

There was nothing wrong with the dollar sign.  As rsingh mentioned, the implication here based on the response you gave to the query suggested by Saied is that the table name had additional characters after the dollar sign that were not "visible". 
The next time you run into this situation, try a variation on saied's query:
select '[' + TABLE_NAME + ']' as delimitedname, datalength(TABLE_NAME), len(TABLE_NAME)
from INFORMATION_SCHEMA.TABLES
where TABLE_NAME like '%country%'
order by TABLE_NAME;
While it is good advice to avoid special characters in identifier names, some of the responses have been not particularly illuminating about the root cause.  Some of them have been very misleading.  It isn't particularly helpful to say do this
or don't do that.  If your identifiers do not conform to the regular identifier rules, then you must delimit them in your tsql statements.  That is extra work and it can cause other tools or users problems when they execute statements that assume
your identifiers do conform.  And even if the special character does conform to the regular identifier rules, it is unusual to see them used and it is just simpler/easier to avoid them generally (since there are only 4 that are allowed - and # has a special
meaning as the first character).