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美国参议员名单数据库设计
原标题:Database design for list of US Senators in MySQL

我正在设计一个表格,仅保留一份美国现任参议员名单和一些相关资料(我从《纽约时报》大会APIC)。 为代表编制表格是容易的,因为我刚刚建立了<条码>。 缩略语..............................................state and region number。 然而,这给我留下了.。

我需要每晚更新本表格中的信息,并将采用<代码>。 INSERT... 页: 1

对如何设计这一点有什么想法?

问题回答

使用<代码>UPDATE,而不是插入,首先通过查询综合关键数值来核对记录。

你不说你重新使用哪一个数据库,但2008年服务器有一份>MERGE说明,非常容易地做到这一点。

如果问题在于如何使用主要钥匙,为什么不把第一名字、最后名称和国家作为首要关键? 该公约可用于参议员和代表。

Don t use INSERT to update existing data, use UPDATE and your PK for that.

你在其他地方说,由于每个州都有两名参议员,你重新选择了PK,而不知道如何加以区别。 美国参议员分为以下三类:;三类:;一州没有两名参议员属于同一类别,因此,你的PK可以进入州和班级。





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