我认为它也许代表查询，但是文档中没有说明。
集合查询计划中引用的所有表。
更新表达式将会在查询中对该副本进行处理。
The updating expression works on this copy further in the query.
它非常直观，但在动态查询环境中扩展能力很差。
It's straightforward, but not very scalable in a dynamic query environment.
还为您提供了扩展以便在查询中包括分类标注。
Extensions are provided for you to include classification annotations in a query.
因此，可以将业务逻辑嵌入查询中。
This makes it possible to embed business logic inside the query.
对于复杂度较低或中等的查询，包括查询DB 2中的MIML数据小节中的查询，查询性能很好。
For queries of low or medium complexity, including the ones in the query MIML Data in DB2 section, the query performance is good.
可以将它保持在内存中，用于查询，然后在完成查询时丢弃它。
It could be kept in memory for querying and then discarded when finished.
因此，我们在这些连接列上添加了索引，从下列查询执行计划中我们可以看到，查询成本减少了很多。
So we added indexes on those joining columns and from the following query execution plan, we can see the query cost is greatly reduced.
此查询可能不会返回任何结果，但是将为您提供保存此查询的选项，如图16中所示。
The query will likely return no results, but you will be given the option to save the query, as shown in Figure 16.
在清单11中，通过创建保存查询的外部文件使查询参数化。
In Listing 11, parameterize your query by creating an external file that holds your query.
动态查询API中的另一个有用特性就是它能够轻松地支持根据例子进行查询。
Another useful facility in a dynamic query API is that it can support query-by-example with relative ease.
一个新的查询测试按钮允许您直接从编辑器中测试查询，而不必首先部署项目。
A new query test button enables you to test your query right from the editor, without having to first deploy the project.
数据聚簇对于数据仓库查询性能的影响尤其显著，因为常常在一个查询中获取许多行。
Data clustering can have an especially large impact on data warehouse query performance, because rows are often retrieved in large Numbers.
在为查询生成计划的过程中，查询优化器与非关系包装器通信。
During plan generation for the query, the query optimizer communicates with the non-relational wrapper.
如果查询表达式中没有任何步骤，则查询表达式将产生开始节点，挂起任何附加的筛选。
If there are no steps in the query expression, the query expression results in the start node, pending any additional filtering.
与过程类似，查询是在查询组中组织的。
Like the processes, the queries are organized in query groups.
如果需要对查询结果拥有更多控制，或者希望保存查询以便将来使用，您可以在查询编辑器中创建查询。
If you need more control over the query results, or if you want to save a query for future use, you can create a query in the query Editor.
在关于性能的文章中，您看到如何通过缓存选择查询和通过CLASS减少使用查询来改进它的性能。
In the performance article, you saw how to improve its performance by caching your selection queries and minimizing your usage of searching by CLASS.
它从数据库中查询资源映射，然后显示门户页面。
It queries the resource mappings from the database, and then displays the portal page.
如果连接器支持的话，可以将这两种查询组合在一个查询请求中。
It's possible to combine both queries into one query request, if your connector supports this behavior.
在清单14中，首先可以看到原有的查询，后面有一个重新构造的查询。
In Listing 14 you can find first the original query followed be a reformulated one.
还演示如何按照在应用程序中查询数据的相同方式查询数据库中的XML数据。
It also demonstrates how querying the XML data in the database is no different from querying the data in the application.
这里所描述的增强，其目的是将允许在大大扩展的环境中异步执行多个远程查询的查询计划引入到WFS V9.1中。
The purpose of the enhancements described here is to introduce query plans into WFS V9.1 that enable asynchronous execution of multiple remote queries in greatly expanded circumstances.
在左边的面板中，展开树结构中的查询。
当在集合上使用查询时，可直接在已有的结果集上执行查询，而不必重新在数据库中执行查询，然后重新将所有数据取出到应用程序中。
When you use query over collection, your query can be executed against existing result sets without the need to re-evaluate the query in the database and re-fetch all the data into your application.
图4展示了哪些查询从这些建议中获益最多。
Figure 4 shows which queries benefited most from the recommendations.
基准测试程序中的16个查询基于我从企业用户那里看到的直实应用程序查询请求。
The 16 queries in the benchmark were based on real application query requests I have seen from business users.
清单2显示了文档中的查询结果。
使用通用查询页面来定义通用查询，并在编目清单数据库中运行它们。
Use the custom queries page to define custom queries and run them against the inventory database.
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