-3
我已在下面的Django模型:瞭解MySQL的CREATE TABLE語法
class UserProfile(models.Model):
user = models.ForeignKey(User, unique=True)
full_name = models.CharField(max_length=100)
network = models.ForeignKey(Network)
positions = models.ManyToManyField(Position, through ='Timestamp', blank=True)
featured_video = models.ForeignKey(VideoInfo, blank=True, null=True)
從SHOW CREATE TABLE userprofile_userprofile
,我得到了下面的MySQL輸出:
| userprofile_userprofile | CREATE TABLE `userprofile_userprofile` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`full_name` varchar(100) NOT NULL,
`network_id` int(11) NOT NULL,
`featured_video_id` int(11) DEFAULT NULL,
`bio` longtext NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `user_id` (`user_id`),
KEY `userprofile_userprofile_fb2a452b` (`network_id`),
KEY `userprofile_userprofile_58bbe944` (`featured_video_id`),
CONSTRAINT `featured_video_id_refs_id_b7c2ab56` FOREIGN KEY (`featured_video_id`) REFERENCES `userprofile_videoinfo` (`id`),
CONSTRAINT `network_id_refs_id_f5c27879` FOREIGN KEY (`network_id`) REFERENCES `network_network` (`id`),
CONSTRAINT `user_id_refs_id_da7416c6` FOREIGN KEY (`user_id`) REFERENCES `auth_user` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=31034 DEFAULT CHARSET=latin1 |
什麼最後的七條線在這裏做什麼?他們有什麼意義?
-
key
constraint
engine=InnoDB
auto-increment=31034
-1沒有事先研究。以上所有內容都包含在MySQL文檔中。如果文件中還沒有回答[深入]問題,那麼這些問題可能會成爲一個很好的問題。這個一般的洗衣清單,沒有。 – 2011-07-03 03:54:39