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如何在MySQL时间戳字段中搜索日期？

2024-05-18 09:06:07 533

您可以为此使用MySQL的DATE()函数。让我们首先创建一个表-

create table DemoTable
(
   StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   StudentAdmissionDate timestamp
);

使用插入命令在表中插入一些记录-

insert into DemoTable(StudentAdmissionDate) values('2011-01-12 12:34:43');
insert into DemoTable(StudentAdmissionDate) values('2012-10-23 11:32:21');
insert into DemoTable(StudentAdmissionDate) values('2001-02-14 05:12:01');
insert into DemoTable(StudentAdmissionDate) values('2018-12-31 15:10:04');
insert into DemoTable(StudentAdmissionDate) values('2019-04-16 11:04:10');

以下是使用select语句显示表中所有记录的查询-

select *from DemoTable;

这将产生以下输出-

+-----------+----------------------+
| StudentId | StudentAdmissionDate |
+-----------+----------------------+
| 1         | 2011-01-12 12:34:43  |
| 2         | 2012-10-23 11:32:21  |
| 3         | 2001-02-14 05:12:01  |
| 4         | 2018-12-31 15:10:04  |
| 5         | 2019-04-16 11:04:10  |
+-----------+----------------------+
5 rows in set (0.00 sec)

这是在时间戳字段中搜索日期的查询。

select *from DemoTable where date(StudentAdmissionDate)='2001-02-14';

这将产生以下输出-

+-----------+----------------------+
| StudentId | StudentAdmissionDate |
+-----------+----------------------+
| 3         | 2001-02-14 05:12:01  |
+-----------+----------------------+
1 row in set (0.04 sec)

我们还可以搜索给定范围之间的日期：

select *from DemoTable where StudentAdmissionDate >='2012-01-01' and StudentAdmissionDate < '2019-12-01';

这将产生以下输出-

+-----------+----------------------+
| StudentId | StudentAdmissionDate |
+-----------+----------------------+
| 2         | 2012-10-23 11:32:21  |
| 4         | 2018-12-31 15:10:04  |
| 5         | 2019-04-16 11:04:10  |
+-----------+----------------------+
3 rows in set (0.00 sec)

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如何在MySQL时间戳字段中搜索日期？

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