text: -- converts hbtn_0c_0 database to UTF8 (utf8mb4, collate utf8mb4_unicode_ci) in your MySQL server.
  -- need to convert Database hbtn_0c_0, Table first_table, Field name in first_table to UTF8
  
  ALTER DATABASE hbtn_0c_0 CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
  USE hbtn_0c_0;
  ALTER TABLE first_table CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
  