SQL词典表是否应具有IDENTITY列 [英] Should an SQL Dictionary table have an IDENTITY column

问题描述

我的应用程序需要通用查找表 Dictionary ，只能由 KEY {VARCHAR（N）UNIQUE}

My application needs a generic lookup table Dictionary that should only be referenced by KEY {VARCHAR(N) UNIQUE}

我是否有理由不应该将 KEY 设置为主键？

Is there any reason I should not set KEY to be the primary key?

推荐答案

您绝对可以使用VARCHAR作为主键。但是作为主键，如果有任何机会，将很难进行更新。但是根据您的需要，您绝对可以使用VARCHAR作为主键

You can definitely use a VARCHAR as a primary key. But being a primary key it would be difficult to update in case of any chance. But as per your need you can definitely use VARCHAR as primary key

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