取消MySQL timestamp列默认ON UPDATE CURRENT_TIMESTAMP

from:http://blog.csdn.net/zht666/article/details/10373923

方法

alter table tablename

column TIMESTAMP NOT NULL DEFAULT ‘0000-00-00 00:00:00′

关于timestamp初始化时，不同的参数的结果如下：

初始化代码

CREATE TABLE cd00_feihu(

t1 TIMESTAMP,

t2 TIMESTAMP NOT NULL,

t3 TIMESTAMP DEFAULT 0,

t4 TIMESTAMP

)

执行后，表的SQL代码将会变成下面的样子

CREATE TABLE cd00_feihu(

t1 TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

t2 TIMESTAMP NOT NULL DEFAULT ‘0000-00-00 00:00:00′,

t3 TIMESTAMP NOT NULL DEFAULT ‘0000-00-00 00:00:00′,

t4 TIMESTAMP NOT NULL DEFAULT ‘0000-00-00 00:00:00′

) ENGINE=INNODB DEFAULT CHARSET=gbk