每个项目都包含数据或键字段的属性。
为了确保数据一致性,强烈推荐使用这些外键。
I do strongly recommend their use in order to ensure data consistency.
简单数据网格存储简单的 “键-值” 对。
此外,组合键倾向于将您的数据库和OR M设计绑定到原始领域。
Also, they tend to tie your database and ORM design to the original domain.
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.
这些键集通过它们的键,提供了对保护数据的读写权限。
These keysets provide read and write access to the data protected by their keys.
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.
即它在一个唯一键组合上只会产生一行数据。
That is it only brings in one row of data for a unique key combination.
首先,修改数据值是很简单的:将新的值分配给适当的键。
First, changing a data value is simple: assign the new value to the appropriate key.
当将数据分解成多个具有外键关系的表时,这尤其重要。
This is important when data is decomposed into multiple tables having foreign key relationship.
另外,分区键仍然必须基于关系数据。
In addition, the partitioning key must still be based on relational data.
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.
关联的数据非常简单:字符串“Hello World”附带有该键号。
The associated data is simple: a string "Hello World" appended with the key number.
每个数据都有一个独特的键。
键/值数据库的突然流行。
我们使用键/值对作为主要的数据结构。
We are using Key/Value pairs as the primary datastructure...
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.
将选择电影标题背后的原始逻辑作为数据库的键。
Take the original reasoning behind selecting movie title as the key for the database.
但和数据库不同的是,本地的唯一键还不行。
Unlike in the case of a database, however, a locally unique key will not do.
它类似于关系数据库中的外键。
按下enter键后,您将看到类似如下的统计数据。
Once you press the Enter key, you will see statistics similar to the following.
可选的许可键数据。
按下确认键进行局部数据转移。
你怎么能在另一个数据库中创建与工作台表的外键?
How can you create a foreign key to a table in another database with workbench?
请在左边一栏输入数据,然后按相等键得到结果。
Please enter number data on the left column and click equal button to get result.
请在左边一栏输入数据,然后按相等键得到结果。
Please enter number on the left column and click equal button to get result.
请在左边一栏输入数据,然后按相等键得到结果。
Please enter number on the left column and click equal button to get result.
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