MYSQL中TIMESTAMP类型可以设定默认值，就像其他类型一样。1、自动UPDATE 和INSERT 到当前的时间：表：/*DDL Information For - test.t1*/---------------------------------Table Create Table------ -------------------------------------------------------------------------------------t1 CREATE TABLE `t1` (`p_c` int(11) NOT NULL,`p_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP) ENGINE=InnoDB DEFAULT CHARSET=gb2312数据：1 -10-08 11:53:352 -10-08 11:54:00insert into t1(p_c) select 3;update t1 set p_c = 2 where p_c = 2;数据：1 -10-08 11:53:352 -10-08 12:00:373 -10-08 12:00:372、自动INSERT 到当前时间，不过不自动UPDATE。表：
/*DDL Information For - test.t1*/
---------------------------------
Table Create Table
------ ---------------------------------------------------------
t1 CREATE TABLE `t1` (
`p_c` int(11) NOT NULL,`p_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=gb2312数据：insert into t1(p_c) select 4;update t1 set p_c = 3 where p_c = 3;1 -10-08 11:53:352 -10-08 12:00:373 -10-08 12:00:374 -10-08 12:05:193、一个表中不能有两个字段默认值是当前时间，否则就会出错。不过其他的可以。表：/*DDL Information For - test.t1*/---------------------------------Table Create Table------ ---------------------------------------------------------------t1 CREATE TABLE `t1` (`p_c` int(11) NOT NULL,`p_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,`p_timew2` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00') ENGINE=InnoDB DEFAULT CHARSET=gb2312数据：
1 -10-08 11:53:35 0000-00-00 00:00:00
2 -10-08 12:00:37 0000-00-00 00:00:00
3 -10-08 12:00:37 0000-00-00 00:00:00
4 -10-08 12:05:19 0000-00-00 00:00:00
本文转自 david_yeung 51CTO博客，原文链接：/yueliangdao0608/81384，如需转载请自行联系原作者
