如何在MySQL时间戳字段中搜索日期?
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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