Recommended upgrade method to 3.6.6?

Can I import the MySQL database from version 3.4.2 into version 3.6.6? Is
the schema the same?
If I do a full install of 3.6.6 and then import the MySQL database would
that work? Is that recommended?

Can I import the MySQL database from version 3.4.2 into version 3.6.6? Is
the schema the same?
If I do a full install of 3.6.6 and then import the MySQL database would
that work? Is that recommended?

Please look at README and UPGRADING file all of this is covered.