ti sei fatto prendere dall' > che ho erroneamente messo 
io NON devo esportarlo in un file.sql ma IMPORTARLO da file sql, rimpiazzando tutto..
ho trovato questo in rete
codice:
To export/backup a database
cd to whatever directory you wish to store the data, and enter:
mysqldump --default-character-set=latin1 -C -u USERNAME -p --opt --lock-tables=false --skip-add-locks --skip-extended-insert DATABASE > DATABASE.sql
Make sure you replace the values in CAPS with the correct info for your account (you can also change the character set if you wish).
To tgz compress the file DATABASE.sql for easier transportation:
tar czvf DATABASE.tgz DATABASE.sql
To import/restore a database:
cd to wherever the sql data is stored, and enter:
mysql -uUSER -pPASSWORD DATABASE < DATABASE.sql
Again, make sure to replace the values in CAPS.
ma credo che manchi un parametro ( -v )?
@joker