0
我有這個表MySQL的組合鍵完整性
CREATE TABLE `inventario` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`cla` varchar(100) NOT NULL,
`des` varchar(500) NOT NULL,
`lin` varchar(3) NOT NULL,
`cal` varchar(20) NOT NULL,
`uen` varchar(20) NOT NULL,
`can` double NOT NULL,
`fei` varchar(10) NOT NULL,
`fec` varchar(10) NOT NULL,
`obs` varchar(500) NOT NULL,
`ppu` double NOT NULL,
`pl1` double NOT NULL,
`pl2` double NOT NULL,
`pl3` double NOT NULL,
`pl4` double NOT NULL,
`prm` double NOT NULL,
`pr1` varchar(50) NOT NULL,
`pr2` varchar(50) NOT NULL,
`mnm` double NOT NULL,
`max` double NOT NULL,
`dias` int(10) NOT NULL DEFAULT '1',
`categoria` varchar(50) NOT NULL,
PRIMARY KEY (`id`,`cla`)
) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8;
Id和CLA是主鍵,但我需要保持完整,這種結構允許複製「勞委會」值:F/E:
Id | Cla
01 | ADI001
02 | ADI001
而我需要避免重複「cla」值,儘管「id」值,我該怎麼做?謝謝。