如何在 MySQL 中检查 now() 是否介于两个特定日期之间?
mysqlmysqli database
此处，now() 表示当前日期。要检查它是否介于两个特定日期之间，您需要使用 BETWEEN。让我们首先创建一个表 −
mysql> create table DemoTable ( FirstDate datetime, SecondDate datetime ); Query OK, 0 rows affected (0.60 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values('2019-04-01','2019-05-02');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable values('2019-05-28','2019-06-04');
Query OK, 1 row affected (0.27 sec)
mysql> insert into DemoTable values('2016-01-31','2019-03-01');
Query OK, 1 row affected (0.15 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
+-----------------------+-----------------------+ | FirstDate | SecondDate | +-----------------------+-----------------------+ | 2019-04-01 00 :00 :00 | 2019-05-02 00 :00 :00 | | 2019-05-28 00 :00 :00 | 2019-06-04 00 :00 :00 | | 2016-01-31 00 :00 :00 | 2019-03-01 00 :00 :00 | +-----------------------+-----------------------+ 3 rows in set (0.00 sec)
以下查询用于检查 now() 是否位于两个特定日期之间 −
mysql> select *from DemoTable where now() BETWEEN FirstDate AND SecondDate;
输出
+-----------------------+-----------------------+ | FirstDate | SecondDate | +-----------------------+-----------------------+ | 2019-05-28 00 :00 :00 | 2019-06-04 00 :00 :00 | +-----------------------+-----------------------+ 1 row in set (0.00 sec)
