我正在设计一个数据库结构。 它将被安装在几处 sql 服务器中。 我需要定期合并这些数据库 。
问题在于 server_A > (PK)id=222 user=Tom ,但问题在于 server_B >>(PK)id=222 user=Peter 。
因此,在 server_A , (FK)userid=222 , Address=1 abc street 中, (FK)userid=222 中, server_B 地址表格中的相同的(FK)userid=222 有不同的含义。
我所能想到的只是这种廉价的方法。 如果我有3个服务器, 我将在第1个服务器上播种 ID, 从 < code> 10000000001 开始, 2 服务器在 < code> 20000001 开始, 3 rd at < code> 30000001 开始 。 这样他们就不会重复了, 这样可能会在一小段时间里运行? 我不需要使用一个 Guid/ unification 来使问题更加复杂吗?
对于这种情况,什么是共同/纠正办法?
您可以将 server_id 添加为外国密钥,该密钥现在包含在 组合主密钥 和原始主密钥中。 每个服务器都有自己的代号 。
使用 SQL 服务器的合并复制功能, 它将为您处理此功能 。
使用 GUID 而不使用 ints 作为主键。 即使在不同系统中生成, 它们也是独一无二的 。
我不是 SQL 服务器合并复制的专家, 但根据< a href=> https:// stackoverflow.com/q/ 5964062/533120>> 的这个文章 < /a>, 它无法自动解决矛盾的 PK, 所以最好首先避免矛盾的 PK 。
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