Data Key-in的意思|示意

A key challenge is effective reference and configuration data distribution in large and highly available SOA implementations.

关键的挑战是在大型的、高可用性的SOA实现中有效的引用及配置数据发布。

Planning for SIAs provides key demographic data – “finding” children in remote villages and households for the first time, and "mapping" their location for future health services.

计划开展补充免疫活动（SIAs）提供了重要的人口统计学数据——首次在边远村庄和家庭中“发现”儿童，并在“地图上标出”他们所在的地点以便于今后的保健服务。

A foreign key is one or more data attributes that appear in one table that may be part of, or is coincidental with, the key of another table.

外键是在一张表中出现的一个或多个数据属性；它可以是另一张表的键的一部分，或者干脆碰巧就是另一张表的键。

Without an index sarg, an index scan will use the index to access the data, but will return every key in the index.

没有索引sarg时，索引扫描将使用索引访问数据，但是会返回索引中的所有键。

If you don't specify a value, you will see the key with zero bytes of data are stored in the value.

如果您不指定一个值，那么您将看到键在值中存储零字节数据。

Key selection: Key selection in multidimensional data modeling is a difficult issue.

键选择：多维数据建模中的键选择是一个难题。