删除更新条件而不删除mysql表

Question

我有一个mysql表和数据条目:

CREATE TABLE    `invoices`.`invoices` (
    `InvoiceID` bigint(20) unsigned NOT NULL auto_increment,
    `UserID` int(10) unsigned NOT NULL,
    `Value` decimal(10,3) NOT NULL,
    `Description` varchar(4048) NOT NULL,
    `DateTime` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
    PRIMARY KEY    (`InvoiceID`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=latin5;

我想删除"更新CURRENT_TIMESTAMP"条件.我怎么能改变这张桌子？

Answer 1

ALTER TABLE `invoices`.`invoices`
    CHANGE `DateTime` `DateTime` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP

Answer 2

aularon的ans不会删除更新条件

可以使用以下两个命令删除它:

ALTER TABLE `invoices`.`invoices`
    CHANGE `DateTime` `DateTime` TIMESTAMP NOT NULL DEFAULT 0;

ALTER TABLE `invoices`.`invoices`
    CHANGE `DateTime` `DateTime` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;

注意:这仅适用于MySQL,而不适用于SQL Server