为了提高性能，JCS在文件磁盘上存储实际缓存数据的同时，会在内存中存储缓存数据键。
To improve performance, JCS stores the cached data keys in memory while storing the actual cached data on the file disk.
如果目标模型跨多个表，数据差异分析还必须考虑数据键和键关系，以便有效地链接数据元素。
Where the target model is spread across multiple tables, the data Gap Analysis must also consider data keys and key relationships to effectively link data elements together.
在这一部分中，您将看到如何生成键，让你存储每个用户会议所用的数据。
In this section, you'll see how to generate keys that let you store data for each user session.
您可以在任何数据库中进行快速测试来确认这一点，方法是打开一个视图，然后按向下箭头键。
You can do a quick test to confirm this in any database by opening a view and then pressing the down arrow.
在这一部分中，您将看到如何生成为每一个用户会话存储数据所用的键。
In this section, you see how to generate keys that let you store data for each user session.
每个项目都包含数据或键字段的属性。
在这种情况下，每个KPI都具有唯一的标识符，可以作为访问历史记录数据的键使用。
In this case, each KPI has a unique identifier, which can be used as a key to access the history data.
您是否具有可用于跨多个系统匹配数据的键或标识符？
Do you have keys or identifiers that can be used for data matching across the participating systems?
通过在频率分布中生成一个值列表，可以使用值列表本身来推断数据的键属性。
By generating a value list in the frequency distribution, the value list by itself can be used to infer key properties of the data.
简单数据网格存储简单的 “键-值” 对。
最常见的惟一的域是一个标识符，它是潜在的数据的键，但是也包括基于文本的描述。
A unique domain is most commonly an identifier that is a potential key to the data, but also includes text-based descriptions.
最常见的惟一的域是一个标识符，它是潜在的数据的键，但是也包括基于文本的描述。
A unique domain is most commonly an identifier, which is a potential key to the data, but also includes text-based descriptions.
一种就是维护操作和数据仓库的键的转换表。
One is to maintain a translation table of operational and data warehouse keys.
在这种环境下，应该查看数据模型来决定分区键的最佳选择。
In this kind of environment, you should examine your data model to determine the best choice for partitioning keys.
试图使用片段或者试图从不存在的键访问数据就会抛出异常，指出相关的错误。
Trying to use slicing or trying to access data from nonexistent keys throws exceptions, indicating the relevant error.
不恰当的分区键可能导致数据分布不均匀。
An inappropriate partitioning key can cause uneven data distribution.
物理数据或键的连续性对于表扫描或键-索引扫描的速度十分重要。
Contiguity of physical data or keys is important to the speed of table scans or key-index scans.
否则，其数据或键将分散在该表或索引所占用的所有区段中。
Otherwise, its data or keys will be scattered throughout the extents that have been occupied by the table or index.
在这些情况下，建议您基于数据平衡选择分区键。
In such cases, it is recommended that you choose a partitioning key based on even data balancing.
数据基于其键放入缓存及从中检索。
Data is put into and retrieved from the cache based on its key.
新例程用来评估已有的和新的分区键的数据倾斜。
New routines to estimate data skews for existing and new partitioning keys.
可帮助您评估新的和已有分区键的数据倾斜的例程。
Routines that can help you estimate the data skew for new and existing partitioning keys.
当使用VARCHAR或VARGRAPHIC数据类型时，索引键限制可能减少。
The index key limit might be reduced when you are using VARCHAR or VARGRAPHIC data type.
第二，我们将直接在位于数据库根的键下面存储然后删除一些简单的值和数据结构。
Second, we will store and then delete some simple values and data structures directly under keys at the database root.
每个数据都有一个独特的键。
要检查表数据的完整性，您可以在表的数据行设置索引键，并将表的数据行关联到相关的LOB。
To check integrity of table data, you can index keys to table rows, and table rows to associated LOBs.
这个标识符(通常是数据库键)能够作为该url参数之一而生成并发送到客户机。
This identifier, most often a database key, can be generated and sent to the client as one of the URL parameters.
键/值数据库的突然流行。
它们可以是主键或惟一键，或其他数据元素的标识符。
These are primary or unique keys, identifiers for the other data elements.
本技巧从问题的简单的描述开始：定义组合数据库键。
This tip starts with a simple description of the problem: defining a composite database key.
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