Simple ajax crud just like php myadmin for two textarea

Please see php myadmin page it uses the required method .I need two textarea with characters remaining counter below and ajax crud functions to update the text typed into the textarea to db live to every character typed without any submit button. The typed text should auto update into db . I need to pass , id + value in textarea name to ajax post so it is sorted at backend php and then inserted into respective column , am attaching the db table