這是我目前的表中有一些行:使用在MySQL取而代之的是沒有實際替代
CREATE TABLE `user_versus` (
`id_user_versus` int(11) NOT NULL AUTO_INCREMENT,
`id_user_winner` int(10) unsigned NOT NULL,
`id_user_loser` int(10) unsigned NOT NULL,
`id_user` int(10) unsigned NOT NULL,
`date_versus` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id_user_versus`),
KEY `id_user_winner` (`id_user_winner`,`id_user_loser`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=14 ;
INSERT INTO `user_versus` (`id_user_versus`, `id_user_winner`, `id_user_loser`, `id_user`, `date_versus`) VALUES
(1, 6, 7, 1, '2013-10-25 23:02:57'),
(2, 6, 8, 1, '2013-10-25 23:02:57'),
(3, 6, 9, 1, '2013-10-25 23:03:04'),
(4, 6, 10, 1, '2013-10-25 23:03:04'),
(5, 6, 11, 1, '2013-10-25 23:03:10'),
(6, 6, 12, 1, '2013-10-25 23:03:10'),
(7, 6, 13, 1, '2013-10-25 23:03:18'),
(8, 6, 14, 1, '2013-10-25 23:03:18'),
(9, 7, 6, 2, '2013-10-26 04:02:57'),
(10, 8, 6, 2, '2013-10-26 04:02:57'),
(11, 9, 8, 2, '2013-10-26 04:03:04'),
(12, 9, 10, 2, '2013-10-26 04:03:04'),
(13, 9, 11, 2, '2013-10-26 04:03:10');
現在,我想插入或者與此查詢替換最後一行:
REPLACE INTO user_versus (id_user_winner, id_user_loser, id_user) VALUES (9, 14, 2)
當我這樣做,而不是取代最後一行(包含這些確切的值),它是添加一個新的行。爲什麼?謝謝!
這是最完整的答案。有效。謝謝! – andufo