Can column comment be a utf-8 in MySQL?

Question

Here is quetions about adding comment to column for MySQL. Can this comment be utf-8? Also what encoding MySQL uses for these columns by default?

Answer 1

Default character set and collation is set when the database is created

CREATE DATABASE mydb
  DEFAULT CHARACTER SET utf8
  DEFAULT COLLATE utf8_general_ci;

You can modify character set on a specific column like this

ALTER TABLE t MODIFY col1 CHAR(50) CHARACTER SET utf8;