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如何在MySQL中将DATETIME转换为DATE？

2024-04-24 02:14:03 376

要将DATETIME转换为MySQL中的DATE，请使用CAST()函数。语法如下-

select cast(yourColumnName as Date) as anyVariableName from yourTableName;

要了解上述语法，让我们首先创建一个表-

mysql> create table ConvertDatetimeToDate
−> (
   −> YourDatetime datetime
−> );

借助insert命令将datetime插入表中。查询如下-

mysql> insert into ConvertDatetimeToDate values(date_add(now(),interval 1 day));

mysql> insert into ConvertDatetimeToDate values(date_add(now(),interval -1 day));

mysql> insert into ConvertDatetimeToDate values(date_add(now(),interval 1 year));

mysql> insert into ConvertDatetimeToDate values(date_add(now(),interval -1 year));

显示上面插入的所有记录。查询如下-

mysql> select *from ConvertDatetimeToDate;

以下是输出-

+---------------------+
|       YourDatetime  |
+---------------------+
| 2018-11-28 16:12:50 |
| 2018-11-26 16:13:00 |
| 2019-11-27 16:13:13 |
| 2017-11-27 16:13:24 |
+---------------------+
4 rows in set (0.00 sec)

现在，您可以应用上述语法将datetime强制转换为date。查询如下-

mysql> select cast(YourDatetime as Date) as OnlyDateDemo from ConvertDatetimeToDate;

以下是输出-

+--------------+
| OnlyDateDemo |
+--------------+
| 2018-11-28   |
| 2018-11-26   |
| 2019-11-27   |
| 2017-11-27   |
+--------------+
4 rows in set (0.00 sec)

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如何在MySQL中将DATETIME转换为DATE？

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