# copies the target data without the structure. Creates a
# complete SQL statement including all the field names.
$ mysqldump -t -c -h host1 db2 > db2.sql 

# copies the structure from db1 to db2, without data
$ mysqldump -d -h host1 db1 | mysql -h host2 db2

# reinserts the data
$ mysql -h host2 db2 < db2.sql