Keys view a "Allows defining primary keys, unique keys, and foreign keys."
keys视图—允许定义主键、惟一键和外键。
GetCatalogKey : Used to convert the selection criteria to a set of unique keys.
getCatalogKey：用于将选择条件转换为一组唯一键。
Use this dialog box to create or modify indexes, primary keys, and unique keys.
使用此对话框可以创建或修改索引、主键和唯一键。
Learn about relational databases, data models, unique keys, primary keys, foreign keys, and table joins.
了解关系数据库、数据模型、惟一键、主键、外键和表联结。
The ODBC Access property "Generate unique keys in index" provides a unique key for database interactivity.
ODBCAccess属性 "Generateunique keys inindex"为数据库交互性提供唯一键。
For primary and unique keys, only the not null columns are listed and can be selected to define these keys.
对于主键和外键，只有非空列才能被列出和选择来定义这些键。
They consecutively store graphical resources (either colors, fonts, or images) in the UIDefaults tables under unique keys.
这些方法连续地将图形化资源(不管是颜色、字体还是图像)存入uidefaults表中惟一的键之下。
In many cases, this approach would be better handled using servlet cache to hold the HTML fragments that can be identified by unique keys.
很多情况下，利用servlet缓存来保存可以通过唯一的主键来识别的HTML片段，这个方法会处理得更好。
In that case, enabling the "Generate unique keys in index" option (see figure 4) causes the view index to display only the first instance of that text string it finds.
在这种情况下，启用“Generateunique keys inindex”选项可使视图索引只显示找到的文本字符串的第一个实例(参见图4)。
For primary and unique keys, only the "not null" columns are listed and can be selected to define these keys. To ease the process of defining foreign keys, the following are provided.
对于主键和惟一键，只列出“非null”列并且可以选择它们定义这些键。
For indexes that are not unique, the number of index keys is less than the number of records.
对于那些不是唯一的索引，索引键的数量要少于记录的数量。
The keys of a dictionary are inherently unique, so it's possible to use a dictionary to remove duplicate lines from a file, and to do so in a way that preserves the original ordering of those lines.
字典的键天生是唯一的，所以可以用字典来删除文件的重复行，为了完成这项工作可以采用保存这些行的原始排序的方法。
The system administrator runs the newkey command for each user to generate unique public and secret keys for the user who wants to use DES authentication.
系统管理员为每个用户运行newkey命令，以便为希望使用DES身份验证的用户生成唯一的公钥和机密密钥。
If you are using a data warehouse where surrogates keys are guaranteed to be unique then consider Maximise data access speed.
如果您使用一个数据仓库，其中的代理键保证都是唯一的，那么要考虑设置为Maximisedataaccess speed。
Tables that use the DB2 Identity value Generation capability to create unique primary keys values.
使用DB 2IdentityValueGeneration功能来创建独特主键值的表格。
The reduce worker reduces the keys to a unique set, with the value representing the number of keys found.
通过代表所发现的键的数量的值，reduce 工作线程将许多键缩减为一个惟一的集合。
Relationships may be formed between any two businesses (as defined by their unique business keys).
任意两个企业(据其独一无二的企业键的定义)之间都可能会形成关系。
The table is logically joined to itself, and the more selective non-leading index keys are applied as index bound filters to each unique combination of the leading key values.
首先在逻辑上将表与其自身连接，然后将更具有选择性的非起始索引键作为索引绑定过滤器，应用于起始键值的每个惟一的组合。
Keys in the GAE datastore are also unique, just as they would be in a traditional database.
GAE数据存储中的键也是惟一的，正如在传统的数据库中一样。
To enforce that specified keys are unique with respect to the specific time period, specify the primary key constraint BUSINESS_TIME WITHOUT OVERLAPS as the last item with the list of other keys.
要确保指定的键在特定时间段内是惟一的，可以指定主键约束BUSINESS_TIMEWITHOUTOVERLAPS作为包含其他键的列表中的最后一项。
Keys are unique within a dictionary while values may not be.
键是在字典中是唯一的，而值未必。
Primary keys are the unique identifiers for each row. They must contain unique values and cannot be null.
主键是每行的唯一标识符，必须包含不重复的值，而且不能为空。
Unique constraints are also called keys.
唯一约束也称为键。
Its unique design lies in the inbuilt storing box that can store name CARDS, keys, cell phones and other office supplies upon raising the marginal ridge.
产品巧妙的设计在于升起围脊、内置的储藏盒设计，可将名片钥匙、手机等办公用品收纳其中。
A one-to-one relationship is created if both of the related columns are primary keys or have unique constraints.
当两个相关列都是主键或都具有唯一约束时，将创建一对一关系。
A one-to-one relationship is created if both of the related columns are primary keys or have unique constraints.
当两个相关列都是主键或都具有唯一约束时，将创建一对一关系。
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