新增、移除及管理主索引键和外部索引键。
包含作为实体类型属性的外部索引键资料行。
外部索引键是强制使用参考完整性的条件约束。
A foreign key is a constraint that enforces referential integrity.
以外部索引键关联为基础的关系不支援这个方法。
This method is not supported for relationships based on a foreign key association.
外部索引键条件约束可让您在父、子资料表之间定义参考整合性。
A foreign key constraint allows you to define referential integrity between a parent and child table.
外部索引键条件约束可于父资料表和子资料表之间，实作参考完整性。
A foreign key constraint can implement referential integrity between parent and child tables.
如果资料表有一个以上的外部索引键，您只能指定其中一个用于这个比例。
If a table has more than one foreign key, you can only specify only one of them to use for the ratio.
说明如何在执行筛选所在的资料表中，使用外部索引键筛选资料表资料列。
Shows how to perform table row filtering using foreign keys in the same table where filtering is performed.
选择的外部索引键资料行，必须与对应的主索引键资料行具有相同的资料型别。
The columns you choose for the foreign key must have the same data type of the primary columns they correspond to.
如果要替含有外部索引键的资料表产生资料，那么也必须替索引键参考的资料表产生资料。
If you want to generate data for a table with foreign keys, you must also generate data for the tables that are referenced by the key.
您必须了解在产生的资料集程序码中，如何建立资料库中的外部索引键条件约束和串联行为。
It is important to understand how foreign-key constraints and cascading behavior in the database are created in the generated dataset code.
例如，建立新的客户和新的订单，然后尝试储存资料，会导致资料库中所定义的外部索引键条件约束发生冲突。
For example, creating a new customer and a new order and then trying to save the data can cause a conflict with the foreign-key constraints defined in the database.
若要成功完成程序，如先前所提，您必须拥有具有父资料表和子资料表(两者之间要有外部索引键关联性)的资料来源。
To successfully complete the procedures, you must have a data source with parent and child tables that have a foreign-key relationship, as mentioned previously.
如果连接列上有一个索引，那么其成本会相当低；否则，数据库服务器就必须对所有表(外部和内部表)执行表扫描。
If there is an index on the join column, the costs will be significantly less; otherwise the database server must perform table scans for all tables, both outer and inner tables.
支持外部分类法(索引系统)以对业务流程和功能进行分类。
Support for external taxonomies (indexing systems) for classification of business processes and functions.
在数据库服务器使用所有表筛选器之后，从外部表检索出的行数将很少，而内部表具有一个可用于执行连接的索引。
The number of rows retrieved from the outer table after the database server applies any table filters is small, and the inner table has an index that can be used to perform the join.
通过索引扫描还是表扫描来访问外部表则取决于该表。
The outer table can be accessed by an index scan or by a table scan, depending on the table.
如果将从外部表加载数据所到的基表定义为不带索引的raw表，则IDS服务器将使用“轻追加法”加载数据。
If the base table to which the data is loaded from the external table is defined to be a RAW table without indexes, the IDS server USES light appends to load the data.
自然、相关的外部链接是搜索引擎之金。
在第二种情况下，文档转换器和索引引擎组件及其子组件通过描述符在外部进行定义，然后使用Spring进行实例化。
In the second scenario, the document translator and indexing engine components and their subcomponents are externally defined through a descriptor and are instantiated using Spring.
外部搜索与人们通过诸如Google之类的搜索引擎访问你的网站时输入的关键词有关。
External search relates to the keywords people use to arrive at your site through search engines such as Google.
最后，抛弃那些主动向搜索引擎提交链接的被动办法把，多做一些高质量的外部链接，你会有意想不到的收获。
Finally, those who take the initiative to abandon the search engine submission links to the passive approach, do some high-quality external links, you will have unexpected gains.
因为通过这个方式增加外部链接影响了其他站点的利益，同时影响搜索引擎对网站排名的合理和公正性。
Because through this method to add external links to other sites of interest, while the search engine rankings of a reasonable and fair.
在迟子建的小说世界中，“自然”与“想象”是两个至为重要的索引关键词，分别指向于人的外部空间与内在生存。
In the novel world of Zijian Chi builds, "nature" and "imagination" are the two most important index keywords, difference is more directional than inner survival and the external space of person.
外部会话的索引。
非规范化设计减少了查询操作所需的连接，减少了外部键和索引的数量，可以预先进行统计计算，提高了查询时的响应速度；
While abnormalization design reduces joins which query requires and the number of keys and indices, can count in advance and improve the query speed.
有人企图通过创建或购买虚假外部链接来欺骗搜索引擎。
But some people try to fool the search engines by creating or buying bogus links all over the web that point to their own website.
外部搜索与人们通过诸如之类的搜索引擎访问你的网站时输入的关键词有关。
External search relates to the keywords people use to arrive at your site through search engines such as.
外部搜索与人们通过诸如之类的搜索引擎访问你的网站时输入的关键词有关。
External search relates to the keywords people use to arrive at your site through search engines such as.
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