final public function fetchOneColumn($column, $key, $value)
    {
        $this->validateShortcutData();

        return $this->db->select($column)
                        ->from(static::getTableName())
                        ->whereEquals($key, $value)
                        ->query($column);
    }
final public function fetchOneColumn($column, $key, $value)
    {
        $this->validateShortcutData();

        return $this->db->select($column)
                        ->from(static::getTableName())
                        ->whereEquals($key, $value)
                        ->query($column);
    }
final public function fetchOneColumn ( $ column , $ key , $ value ) { $ this -> validateShortcutData ( ) ; return $ this -> db -> select ( $ column ) -> from ( static :: getTableName ( ) ) -> whereEquals ( $ key , $ value ) -> query ( $ column ) ; }
Fetches one column

@param string $column
@param string $key
@param string $value
@return array
Fetches one column