以下的文章主要介绍的是MySQL Date函数的实际应用其中包括如何获取当前时间的具体操作，Unix时间的具体应用，时间前后、时间间隔与时间转换的实际内容描述，以下就是文章的主要内容。
MySQL Date函数 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)
MySQL Date函数 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)
MySQL Date函数 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)
MySQL Date函数 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)
MySQL Date函数 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)
上面说了这么多内容，是关于对MySQL Date函数的介绍，不知道各位对MySQL的认识是不是更上一层楼了，时时关注ITJS，学习最新Mysql技术。