使用扩展指示符支持，单个程序可以基于一个公共键用于单个表的所有更新事务。
With extended indicator support, a single program can be used for all incoming update transactions against a single table based on a common key.
但是，在很多情况下，重要的实体是一个记录的一个子集，或者跨多个表，需要通过公共键链接数据。
However, in many cases, an entity of importance is a subset of a record, or spans several tables and requires data to be joined through a common key.
我生成了一个公共ssh键；如果您还没有的话，那么应当生成一个键。
I gave my public SSH key; you should generate one if you don't have one already.
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