您的数据库表还没有定义的主要关键字，所以现在您需要设置它们。
Your database tables did not have primary keys defined, so you will set them now.
其他用户或应用程序已经删除了该记录或更改了其主要关键字的值。
Another user or application has already deleted this record, or changed the value of its primary key.
点击Employee实体，并选择empno作为它的主要关键字。
Click the Employee entity, and select empno its primary key.
您可以设置主要关键字，创建并编辑查询，添加并删除关系，以及设置一个同步列。
You can set primary keys, create and modify queries, add and remove relationships, and set a concurrency column.
在索引文件中，通过数据记录中的主要关键字或可选关键字进行数据记录的检索的一种方法。
The retrieval of a data record in an indexed file by the primary (or optionally, alternate) key within the data record .
在主要关键字Tasks页面中，选择deptno以作为Department实体的主要关键字。
On the primary key Tasks page, select deptno as the primary key for the Department entity.
你不是想集中精力寻找长期句话，希望这些人搜寻四句话用你的主要关键字(一个字)，并让市场来你。
Rather than trying to focus your efforts on long search phrases, and hoping people are searching for those phrases, use your main keyword (one word), and let the market come to you.
这两个方法主要的共同之处是，它们都使用一个关键字作为参数，并返回一个或多个精确匹配的文档作为结果。
The main similarity between these two methods is that they both take one keyword as a parameter and return one or more exact matching documents as a result.
要使用的对象描述你在时尚的主要缺点，特别是在一个服务器或图书馆的情况，是“这”关键字可以由调用者修改。
The main drawback to the use of Objects in the fashion you describe, especially in a server or library scenario, is that the "this" keyword can be modified by the caller.
目前已有的检索系统主要采用基于关键字的全文检索以及分类检索技术。
So far, retrieval system is mainly based on the keyword search and classification technology.
托管扩展设计的一个主要目标是不引入与标准语言不兼容的内容，例如新关键字和新标记。
A primary goal of the Managed Extensions design was to not introduce incompatibilities with the standard language, such as new keywords and tokens.
托管扩展设计的一个主要目标是不引入与标准语言不兼容的内容，例如新关键字和新标记。
A primary goal of the Managed Extensions design was to not introduce incompatibilities with the standard language, such as new keywords and tokens.
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