如何在 MySQL 时间戳字段中搜索日期?
mysqlmysqli database
您可以使用 MySQL 中的 DATE() 函数来实现此目的。让我们首先创建一个表 −
mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentAdmissionDate timestamp ); Query OK, 0 rows affected (0.63 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(StudentAdmissionDate) values('2011-01-12 12:34:43');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(StudentAdmissionDate) values('2012-10-23 11:32:21');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(StudentAdmissionDate) values('2001-02-14 05:12:01');
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable(StudentAdmissionDate) values('2018-12-31 15:10:04');
Query OK, 1 row affected (0.22 sec)
mysql> insert into DemoTable(StudentAdmissionDate) values('2019-04-16 11:04:10');
Query OK, 1 row affected (0.81 sec)
以下是使用 select 语句显示表中的所有记录的查询 −
mysql> 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。
mysql> 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内的日期:
mysql> 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)
