MySql Date函数

最新推荐文章于 2025-06-16 19:36:44 发布

weixin_30410999

最新推荐文章于 2025-06-16 19:36:44 发布

阅读量320

点赞数

CC 4.0 BY-SA版权

文章标签：数据库

原文链接：http://www.cnblogs.com/heroking2000/archive/2010/01/18/1651025.html

本文详细介绍MySQL中关于时间日期的操作，包括获取当前时间、日期和时间戳，进行时间加减运算，计算时间间隔，以及时间格式的转换。通过具体示例展示如何使用MySQL内置函数如CURRENT_TIMESTAMP、UNIX_TIMESTAMP、DATE_ADD、DATEDIFF等。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1、获取当前时间

mysql> select current_timestamp();
+---------------------+
| current_timestamp() |
+---------------------+
| 2010-01-18 21:24:37 |
+---------------------+
1 row in set (0.00 sec)

mysql> select current_date();
+----------------+
| current_date() |
+----------------+
| 2010-01-18 |
+----------------+
1 row in set (0.00 sec)

mysql> select current_time();
+----------------+
| current_time() |
+----------------+
| 21:24:46 |
+----------------+
1 row in set (0.00 sec)

2、Unix时间

mysql> select unix_timestamp();
+------------------+
| unix_timestamp() |
+------------------+
| 1263821184 |
+------------------+
1 row in set (0.00 sec)

mysql> select from_unixtime(1263821182);
+---------------------------+
| from_unixtime(1263821182) |
+---------------------------+
| 2010-01-18 21:26:22 |
+---------------------------+
1 row in set (0.00 sec)

3、时间前后

mysql> select date_add(current_timestamp, interval 1 day);
+---------------------------------------------+
| date_add(current_timestamp, interval 1 day) |
+---------------------------------------------+
| 2010-01-19 21:27:53                         |
+---------------------------------------------+
1 row in set (0.00 sec)

mysql> select date_add(current_time, interval 1 day);
+----------------------------------------+
| date_add(current_time, interval 1 day) |
+----------------------------------------+
| NULL                                   |
+----------------------------------------+
1 row in set, 1 warning (0.00 sec)

mysql> select date_add(current_date, interval 1 day);
+----------------------------------------+
| date_add(current_date, interval 1 day) |
+----------------------------------------+
| 2010-01-19                             |
+----------------------------------------+
1 row in set (0.00 sec)

mysql> select date_sub(current_timestamp, interval 1 day);
+---------------------------------------------+
| date_sub(current_timestamp, interval 1 day) |
+---------------------------------------------+
| 2010-01-17 21:28:41                         |
+---------------------------------------------+
1 row in set (0.00 sec)

mysql> select date_sub(current_date, interval 1 day);
+----------------------------------------+
| date_sub(current_date, interval 1 day) |
+----------------------------------------+
| 2010-01-17                             |
+----------------------------------------+
1 row in set (0.00 sec)

mysql> select date_sub(current_time, interval 1 day);
+----------------------------------------+
| date_sub(current_time, interval 1 day) |
+----------------------------------------+
| NULL                                   |
+----------------------------------------+
1 row in set, 1 warning (0.00 sec)

4、时间间隔

mysql> select datediff('2010-01-18','2010-01-17');
+-------------------------------------+
| datediff('2010-01-18','2010-01-17') |
+-------------------------------------+
| 1 |
+-------------------------------------+
1 row in set (0.00 sec)

mysql> select timediff('2010-01-18 12:00','2010-01-17 11:00');
+-------------------------------------------------+
| timediff('2010-01-18 12:00','2010-01-17 11:00') |
+-------------------------------------------------+
| 25:00:00 |
+-------------------------------------------------+
1 row in set (0.00 sec)

5、时间转换

mysql> select time_to_sec('25:00:00');
+-------------------------+
| time_to_sec('25:00:00') |
+-------------------------+
| 90000 |
+-------------------------+
1 row in set (0.00 sec)

mysql> select sec_to_time(90000);
+--------------------+
| sec_to_time(90000) |
+--------------------+
| 25:00:00 |
+--------------------+
1 row in set (0.00 sec)

转载于:https://www.cnblogs.com/heroking2000/archive/2010/01/18/1651025.html