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从varchar转换为datetime并在MySQL中进行比较？

2024-04-27 05:39:04 398

为此，您可以使用STR_TO_DATE()。让我们首先创建一个表-

mysql> create table DemoTable1565
   -> (
   -> ArrivalDatetime varchar(40)
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable1565 values('10/01/2019 21:29:35');
mysql> insert into DemoTable1565 values('10/13/2019 4:56:00');
mysql> insert into DemoTable1565 values('10/13/2018 12:40:46');
mysql> insert into DemoTable1565 values('10/13/2019 21:30:00');

使用select语句显示表中的所有记录-

mysql> select * from DemoTable1565;

这将产生以下输出-

+---------------------+
| ArrivalDatetime     |
+---------------------+
| 10/01/2019 21:29:35 |
| 10/13/2019 4:56:00  |
| 10/13/2018 12:40:46 |
| 10/13/2019 21:30:00 |
+---------------------+
4 rows in set (0.00 sec)

当前日期如下-

mysql> select now();
+---------------------+
| now()               |
+---------------------+
| 2019-10-13 21:34:14 |
+---------------------+
1 row in set (0.00 sec)

这是将varchar转换为datetime并进行比较的查询-

mysql> select * from DemoTable1565 where str_to_date(ArrivalDatetime,'%m/%d/%Y')=curdate();

这将产生以下输出-

+---------------------+
| ArrivalDatetime     |
+---------------------+
| 10/13/2019 4:56:00  |
| 10/13/2019 21:30:00 |
+---------------------+
2 rows in set, 4 warnings (0.03 sec)

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从varchar转换为datetime并在MySQL中进行比较？

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