如何使用MySQL选择小于当前日期的日期？

首先让我们创建一个表 –

mysql> create table DemoTable1877
   (
   DueDate datetime
   );
Query OK, 0 rows affected (0.00 sec)

使用插入命令将一些记录插入表中 –

mysql> insert into DemoTable1877 values('2019-12-10');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1877 values('2019-12-05');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1877 values('2019-12-07');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1877 values('2019-12-09');
Query OK, 1 row affected (0.00 sec)

使用select语句显示表中的所有记录 –

mysql> select * from DemoTable1877;

这将产生以下输出 –

+---------------------+
| DueDate             |
+---------------------+
| 2019-12-10 00:00:00 |
| 2019-12-05 00:00:00 |
| 2019-12-07 00:00:00 |
| 2019-12-09 00:00:00 |
+---------------------+
4 rows in set (0.00 sec)

当前日期如下 –

mysql> select curdate();
+------------+
| curdate()  |
+------------+
| 2019-12-08 |
+------------+
1 row in set (0.00 sec)

以下是选择小于当前日期的日期的查询 –

mysql> select * from DemoTable1877 where DueDate < now();

这将产生以下输出 –

+---------------------+
| DueDate             |
+---------------------+
| 2019-12-05 00:00:00 |
| 2019-12-07 00:00:00 |
+---------------------+
2 rows in set (0.00 sec)

阅读更多：MySQL 教程