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MySQL ORDER BY Date字段不是日期格式？

2024-05-10 00:13:04 317

以下是非日期格式的按日期排序的语法

select *from yourTableName
order by
STR_TO_DATE(yourColumnName,'%d/%m/%Y') DESC;

为了理解上述语法，让我们创建一个表。创建表的查询如下

mysql> create table orderByDateFormatDemo
   -> (
   -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> ArrivalDatetime varchar(100)
   -> );

使用insert命令在表中插入一些记录。查询如下-

mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('01/10/2012');
mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('03/11/2010');
mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('04/09/2018');
mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('31/01/2019');
mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('21/04/2017');
mysql> insert into orderByDateFormatDemo(ArrivalDatetime) values('23/05/2016');

使用select语句显示表中的所有记录。查询如下-

mysql> select *from orderByDateFormatDemo;

以下是输出

+----+-----------------+
| Id | ArrivalDatetime |
+----+-----------------+
|  1 | 01/10/2012      |
|  2 | 03/11/2010      |
|  3 | 04/09/2018      |
|  4 | 31/01/2019      |
|  5 | 21/04/2017      |
|  6 | 23/05/2016      |
+----+-----------------+
6 rows in set (0.00 sec)

这是对非日期格式的ORDERBY日期字段的查询

mysql> select *from orderByDateFormatDemo
   -> order by
   -> STR_TO_DATE(ArrivalDatetime,'%d/%m/%Y') DESC;

以下是输出

+----+-----------------+
| Id | ArrivalDatetime |
+----+-----------------+
|  4 | 31/01/2019      |
|  3 | 04/09/2018      |
|  5 | 21/04/2017      |
|  6 | 23/05/2016      |
|  1 | 01/10/2012      |
|  2 | 03/11/2010      |
+----+-----------------+
6 rows in set (0.04 sec)

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MySQL ORDER BY Date字段不是日期格式？

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