![[转]MySQL不为人知的主键与唯一索引约束](http://www.mobabel.net/wp-content/themes/hueman/assets/front/img/thumb-medium-empty.png)
[转]MySQL不为人知的主键与唯一索引约束
今天和大家简单聊聊MySQL的约束主键与唯一索引约束： PRIMARY KEY and UNIQUE Index Constraints 文章不长，保证有收获。
-
epan says:抢购场景下，一般限定一个人一台，结合业务来实现。 -
biguoyong says:
-
Just One Pure ITer
今天和大家简单聊聊MySQL的约束主键与唯一索引约束： PRIMARY KEY and UNIQUE Index Constraints 文章不长，保证有收获。
第一篇，说说MySQL两个最常用的存储引擎，MyISAM和InnoDB。照自己的理解，把一些知识点总结出来，不只说知识点，多讲“为什么”。
Follow:
![[汇总]汽车软件构架](http://www.mobabel.net/wp-content/themes/hueman/assets/front/img/thumb-small-empty.png)
| Cookie | Duration | Description |
|---|---|---|
| cookielawinfo-checkbox-analytics | 11 months | This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics". |
| cookielawinfo-checkbox-functional | 11 months | The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". |
| cookielawinfo-checkbox-necessary | 11 months | This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary". |
| cookielawinfo-checkbox-others | 11 months | This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. |
| cookielawinfo-checkbox-performance | 11 months | This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance". |
| viewed_cookie_policy | 11 months | The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data. |