如何在Mysql / Sql中按時間列對表進行排序？

Question

Mysql 5

表名是時間表。

departure_time data_type = varchar（20）

詢問

select * from schedules;

輸出：

+-------------+----------------+-----------+----------------+-------------+--------+-----------------+
| travel_date | departure_time | origin_id | destination_id | operator_id | status | available_seats |
+-------------+----------------+-----------+----------------+-------------+--------+-----------------+
| 2014-06-09  | 02:30 PM       |       134 |            251 |           2 | Active |              44 |
| 2014-06-09  | 09:30 PM       |       134 |            251 |           2 | Active |              14 |
| 2014-06-09  | 10:00 PM       |       134 |            251 |           2 | Active |              24 |
| 2014-06-09  | 12:30 PM       |       134 |            251 |           2 | Active |              23 |
| 2014-06-09  | 11:15 PM       |       134 |            251 |           2 | Active |              27 |
| 2014-06-09  | 09:30 PM       |       134 |            251 |           4 | Active |              24 |
+-------------+----------------+-----------+----------------+-------------+--------+-----------------+



SELECT * FROM schedules 
WHERE (travel_date ='2014-06-09' and origin_id ='134' 
and destination_id ='251' and operator_id not in (SELECT id FROM operators WHERE (status != 'Active')) and status ='Active' and available_seats > 0) 
ORDER BY departure_time ASC;

輸出：

+-------------+----------------+-----------+----------------+-------------+--------+-----------------+
| travel_date | departure_time | origin_id | destination_id | operator_id | status | available_seats |
+-------------+----------------+-----------+----------------+-------------+--------+-----------------+
| 2014-06-09  | 02:30 PM       |       134 |            251 |           2 | Active |              44 |
| 2014-06-09  | 09:30 PM       |       134 |            251 |           2 | Active |              14 |
| 2014-06-09  | 09:30 PM       |       134 |            251 |           4 | Active |              24 |
| 2014-06-09  | 10:00 PM       |       134 |            251 |           2 | Active |              24 |
| 2014-06-09  | 11:15 PM       |       134 |            251 |           2 | Active |              27 |
| 2014-06-09  | 12:30 PM       |       134 |            251 |           2 | Active |              23 |
+-------------+----------------+-----------+----------------+-------------+--------+-----------------+

這里如何通過departure_time asc生成此表順序

例如：departure_time應該是這樣的： - 12：30 PM，02：30 PM，09：30 PM，09：30 PM，10：00 PM，11：15 PM

Answer 1

按照這樣的說法更改您的訂單會有所幫助

  ORDER BY STR_TO_DATE(timeField,'%h.%i%p');

數據類型TIME用於存儲時間數據類型 - 這意味着沒有AM / PM。 將數據以24小時格式存儲在您的數據庫中，並使用以下方法之一將其格式化為12小時格式，使用am / pm（PHP或MySQL）：

PHP：

$date = new DateTime($mysql_column['time']);
$date->format('h:i:s a');

要么：

$date = date('h:i:s a', strtotime($mysql_column['time']));
or MySQL:

SELECT DATE_FORMAT（'％h：％i：％s％p'，time）FROM table;

Answer 2

它的類型是varchar(20)因此它將被排序為簡單的字符串。