MySQL主键字段类型

Question

I am working with some transactional data and having issues with my primary key field. When importing data from my order manager system and Google analytics, the OrderID field has the following two value formats:

123456  
002-0130775-1483424

How do I format this field to be a primary key?

Thank you in advance for your help! :)

(Running MySQL 5.5.27)

Answer 1

您应该创建一个包含任意整数（一个“内部”键）的自动递增主键字段...您可以将实际的“键”数据放在另一个名为OrderNumber或类似名称的字段中，并在其上放置一个唯一索引。

Answer 2

作为一种选择，您可以设置一个语法主键（仅用于内部引用）和一个索引的CHAR（20）列（可能为一致性目的附加了唯一索引）–这似乎是您一天中更好的解决方案可能希望与可能与现有数据发生冲突的另一个系统集成。

Answer 3

Yes, keeping your primary key internal helps insulate you from change. Anything that could be exposed as data should be re-considered as a key.

Answer 4

See, primary key should be bigint in nature, However you can modify the way you want. MYSQL 5.5.27 have some important changes from its earlier version ,please follow the link https://dev.mysql.com/doc/refman/5.5/en/news-5-5-27.html