如何在MySQL查询中验证过期日期？

您可以使用NOW()函数。以下是语法 –

select * from yourTableName
where yourColumnName> now();

首先我们创建一个表 –

mysql> create table DemoTable
   (
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   expiryDateOfMedicine datetime
   );
Query OK, 0 rows affected (0.55 sec)

使用insert命令将记录插入表中 –

mysql> insert into DemoTable(expiryDateOfMedicine) values('2019-04-27 11:29:00');
Query OK, 1 row affected (0.36 sec)
mysql> insert into DemoTable(expiryDateOfMedicine) values('2019-04-26 10:39:21');
Query OK, 1 row affected (0.41 sec)
mysql> insert into DemoTable(expiryDateOfMedicine) values('2019-04-28 11:30:10');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(expiryDateOfMedicine) values('2019-04-29 12:44:11');
Query OK, 1 row affected (0.18 sec)

使用select语句显示表中的所有记录 –

mysql> select * from DemoTable;

这将会输出以下结果 –

+----+----------------------+
| Id | expiryDateOfMedicine |
+----+----------------------+
| 1  | 2019-04-27 11:29:00  |
| 2  | 2019-04-26 10:39:21  |
| 3  | 2019-04-28 11:30:10  |
| 4  | 2019-04-29 12:44:11  |
+----+----------------------+
4 rows in set (0.00 sec)

以下是验证MySQL查询中有效期的查询 –

mysql> select * from DemoTable
where expiryDateOfMedicine > now();

这将输出以下结果 –

+----+----------------------+
| Id | expiryDateOfMedicine |
+----+----------------------+
| 3  | 2019-04-28 11:30:10  |
| 4  | 2019-04-29 12:44:11  |
+----+----------------------+
2 rows in set (0.00 sec)

阅读更多：MySQL 教程