在对外部查询应用惟一筛选器时可使用类似的技术，点符号将用于说明筛选结果所依据的字段。
A similar technique is used when applying the unique filter to the outer query, with dot notation used to indicate the field by which results are to be filtered.
这段脚本的第一小段跟以前一样 —两个嵌套的SQL查询，内部查询使用外部查询的数据生成一个国家和城市数据列表。
The first segment of this script is as before — two nested SQL queries, with the inner one using data from the outer one to generate a list of country and city data.
可以根据后端特定查询字符串，使用连接标签来创建外部资源的列表。
The connect tags can be used to create lists of external resources based on a backend specific query string.
外部连接可能会对查询性能产生负面影响。
Outer joins may have a negative impact on query performance.
由于这个项目对服务级别的要求很低，因此使用一个外部数据库来处理查询并没有什么好处。
Since this project required an almost trivial level of service, there would be no benefit to passing queries to and from an external database.
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.
可以向服务器上增加XSLT服务，通过外部XSLT服务处理查询结果，或者在XML输出重增加样式表链接。
You can add an XSLT service to your server, process the query results through an external XSLT service, or add a link to the stylesheet in the XML output.
这样您就可以将更多的精力用于核心业务需求，在需要的时候，从外部资源加入所需的额外功能—查询、认证、备用表示层等。
You can focus on your core business requirements and mix in the additional functionality you need - searching, authentication, alternate presentation layers, and more - from external resources.
因此，即使使用外部数据查询，重要的也是作者要知道他们的动作的后果，做出最适合他们的需求和性能要求的决策。
So even in the case of external data queries, it is important for authors to know the implications of their actions and make decisions that best suite their needs and performance requirements.
TDI模块能够通过查询外部数据源来获取属性和用户组。
The TDI module has the capability to query external data sources to retrieve attributes and user's groups.
出于dba视图外部的原因，参议院可能在一天的不同时间运行不同类型的查询。
For reasons outside the DBAs view, the Senate tends to run different kinds of queries at different times of the day.
在使用改写查询作为问题的短期解决方案不可行的时候，比如查询的执行效率很低的时候，外部优化器指令可能很有用。
External optimizer directives are useful when it is not feasible to rewrite a query for a short-term solution to a problem, for example, when a query starts to perform poorly.
充实：通过添加来自外部数据源的信息(如由中介定义的自定义参数或者来自数据库查询的自定义参数)来增加消息的有效负载。
Enrich: Augments the message payload by adding information from external data sources, such as customization parameters defined by the mediation, or from database queries.
要执行该查询，需要调整查询来采用外部URL清单，然后传递所要检查的特定 URL。
To perform this query, you need to adjust the query to use the external URL list and pass along the specific URL that you're checking for.
清单10使用一个SELECT查询来解析一个外部XML文档，并对结果应用一个XPath表达式来选取节点的特定子集。
Listing 10 USES a select query to parse an external XML document and apply an XPath expression to the result to select a specific subset of nodes.
在数据菜单上，指向导入外部数据，再单击新建Web查询。
On the Data menu, select Import External Data, and click New Web Query.
这意味着ij、DatabaseExplorer和Eclipse外部的客户机应用程序都可以连接和查询该数据库中的表。
This means ij, the database Explorer, and a client application external to Eclipse could all connect to and query the tables in the database.
不能在主查询中使用多个外部表。
使用清单11中的查询选择外部表中的行。
Select the rows from the external table using the query in Listing 11.
使用以下查询创建外部表。
假定需要查询一个外部客户关系管理(CRM)系统以获取客户的数据。
Suppose you need to query an external customer relationship management (CRM) system to retrieve customer's data. Your invocation of the CRM system might look like this.
指定从外部SQL查询导入的字段。
Data, which specifies the fields to be imported from the outer SQL query.
SearchletPortlet将使用Results消息，并使用其中的查询部分向外部搜索服务再次发出相同的查询。
The Searchlet portlet consumes the Results message and USES the query part of it to issue the same query against the external search service.
图13显示链接到一个名为GOSales (query)的现有表的Retailers查询主题中的一个查询项的外部文件。
Illustration 13 shows an external file linked to a query item in the Retailers query subject of an existing package called GO Sales (query).
在该版本中，DBA(作为用户informix)可以创建外部优化器指令，并将其应用于后续的查询，而不需要修改现有的应用程序代码。
In this release, the DBA (as user informix) can create external optimizer directives and apply them to subsequent queries, without changing existing application code.
例如，可以将怀疑可能更改的任何查询放在外部。
For example, any queries you suspect can be changed can be placed externally.
外部化或分离查询可以在更改查询时实现某些灵活性。
Externalizing or separating the query enables some flexibility in changing the query.
其主要优点是查询的外部化，因此，带注释的命名查询(如果有)几乎没有任何意义。
The major benefit is the externalization and, therefore, an annotated named query makes little sense, if any.
被查询的组织结构存储在外部人员存储库中，如LDAP。
The queried organizational structures are stored in an external staff repository like LDAP.
命名查询是外部化查询的好方法。尽管将命名查询定义为注释可以使查询在代码中得到更多重用，但是优点很少，在本质上没有使用价值。
Although defining a named query as an annotation can make it more reusable in the code, the benefit is so minimal that it is essentially useless.
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