MySQL中按日期和时间降序排序？

让我们创建一个表来按升序对日期和时间进行排序。创建表的查询如下 -

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

使用insert命令在表中插入记录。查询如下 -

mysql> insert into SortByDateAndTime values(1,'John','2018-12-16','10:30');
Query OK, 1 row affected (0.14 sec)

mysql> insert into SortByDateAndTime values(2,'Bob','2018-12-16','10:10');
Query OK, 1 row affected (0.14 sec)

mysql> insert into SortByDateAndTime values(3,'Carol','2018-12-16','10:20');
Query OK, 1 row affected (0.10 sec)

mysql> insert into SortByDateAndTime values(4,'Sam','2018-12-16','10:00');
Query OK, 1 row affected (0.15 sec)

使用 select 语句显示表中所有记录的查询如下 -

mysql> select *from SortByDateAndTime;

输出

+--------+----------+------------+-----------+
| UserId | UserName | IssueDate  | IssueTime |
+--------+----------+------------+-----------+
|     1 | John      | 2018-12-16 | 10:30:00  |
|     2 | Bob       | 2018-12-16 | 10:10:00  |
|     3 | Carol     | 2018-12-16 | 10:20:00  |
|     4 | Sam       | 2018-12-16 | 10:00:00  |
+--------+----------+------------+-----------+
4 rows in set (0.00 sec)

这是按降序对日期和时间进行排序的查询 -

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

以下是以排序的日期和时间显示的输出 -

+--------+----------+------------+-----------+
| UserId | UserName | date1      | IssueTime |
+--------+----------+------------+-----------+
|      1 | John     | 2018-12-16 | 10:30:00  |
|      3 | Carol    | 2018-12-16 | 10:20:00  |
|      2 | Bob      | 2018-12-16 | 10:10:00  |
|      4 | Sam      | 2018-12-16 | 10:00:00  |
+--------+----------+------------+-----------+
4 rows in set (0.00 sec)

或者您可以使用另一个查询来对日期和时间进行排序。查询如下 -

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

输出

+--------+----------+------------+-----------+
| UserId | UserName | date1      | IssueTime |
+--------+----------+------------+-----------+
|      4 | Sam      | 2018-12-16 | 10:00:00  |
|      2 | Bob      | 2018-12-16 | 10:10:00  |
|      3 | Carol    | 2018-12-16 | 10:20:00  |
|      1 | John     | 2018-12-16 | 10:30:00  |
+--------+----------+------------+-----------+
4 rows in set (0.00 sec)

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