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我有一個MySQL表結構如下:如何修改MySQL列以在插入時設置CURRENT_TIMESTAMP並在更新時不做任何事情?
CREATE TABLE `admin_members` (
`admin_id` varchar(14) NOT NULL,
`joined_on` timestamp NOT NULL,
`admin_email` varchar(128) NOT NULL,
`admin_password` varchar(128) NOT NULL,
`admin_name` varchar(128) NOT NULL,
UNIQUE KEY `admin_id` (`admin_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
我想joined_on字段來自動設置爲CURRENT_TIMEZONE上插入作爲默認值,並做更新什麼。我怎樣才能更新表來做到這一點?