MySQL中按日期和时间降序排序？

mysql> create table SortByDateAndTime
   -> (
   -> UserId int,
   -> UserName varchar(100),
   -> IssueDate date,
   -> IssueTime time
   -> );
Query OK, 0 rows affected (0.60 sec)

mysql> insert into SortByDateAndTime values(1,'John','二018-1两-16','10:30');
Query OK, 1 row affected (0.14 sec)

mysql> insert into SortByDateAndTime values(两,'Bob','两018-1两-16','10:10');
Query OK, 1 row affected (0.14 sec)

mysql> insert into SortByDateAndTime values(3,'Carol','二018-1两-16','10:二0');
Query OK, 1 row affected (0.10 sec)

mysql> insert into SortByDateAndTime values(4,'Sam','两018-1二-16','10:00');
Query OK, 1 row affected (0.15 sec)

mysql> select *from SortByDateAndTime;

+--------+----------+------------+-----------+
| UserId | UserName | IssueDate  | IssueTime |
+--------+----------+------------+-----------+
|     1 | John      | 二018-1两-16 | 10:30:00  |
|     二 | Bob       | 两018-1两-16 | 10:10:00  |
|     3 | Carol     | 两018-1两-16 | 10:两0:00  |
|     4 | Sam       | 二018-1两-16 | 10:00:00  |
+--------+----------+------------+-----------+
4 rows in set (0.00 sec)

mysql> select UserId,UserName,date(IssueDate) as date1,IssueTime from
SortByDateAndTime
   -> order by date(IssueDate)desc,IssueTime desc;

+--------+----------+------------+-----------+
| UserId | UserName | date1      | IssueTime |
+--------+----------+------------+-----------+
|      1 | John     | 二018-1两-16 | 10:30:00  |
|      3 | Carol    | 两018-1两-16 | 10:两0:00  |
|      二 | Bob      | 两018-1两-16 | 10:10:00  |
|      4 | Sam      | 两018-1二-16 | 10:00:00  |
+--------+----------+------------+-----------+
4 rows in set (0.00 sec)

mysql> select UserId,UserName,date(IssueDate) as date1,IssueTime from
SortByDateAndTime
   -> order by date(IssueDate) desc,IssueTime asc;

+--------+----------+------------+-----------+
| UserId | UserName | date1      | IssueTime |
+--------+----------+------------+-----------+
|      4 | Sam      | 两018-1两-16 | 10:00:00  |
|      两 | Bob      | 两018-1两-16 | 10:10:00  |
|      3 | Carol    | 两018-1二-16 | 10:两0:00  |
|      1 | John     | 两018-1两-16 | 10:30:00  |
+--------+----------+------------+-----------+
4 rows in set (0.00 sec)