[서버 설정 변경]
character_set_client = utf8mb4
character_set_connection = utf8mb4
character_set_database = utf8mb4
character_set_filesystem = binary
character_set_results = utf8mb4
character_set_server = utf8mb4
character_set_system = utf8
collation_connection = utf8mb4_unicode_ci
collation_database = utf8mb4_unicode_ci
collation_server = utf8mb4_unicode_ci
[테이블/컬럼 설정 변경]
ALTER DATABASE homestead CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;
ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;