您要查找的是不是：
- XML query optimization XML查询优化
- The semantics information is important to the design of XML schema,query optimization and check of update abnormity. 通过该算法得到的XML函数依赖的语义信息对数据存储模式设计、查询优化和更新异常检查来说是十分重要的。
- As join operation to relational database,structural join order selection is at the heart of query optimization in an XML database. 和关系数据库中的连接运算一样,结构连接顺序的选择是XML数据库查询优化的核心。
- The result of an XML query, on the other hand, has none of these properties. 而XML查询的结果却没有这些属性。
- You may want to index the XML data to speed up XML query performance. 您可能希望对XML数据创建索引以提高XML查询的性能。
- Efficient structural join is the key operation in XML query processing. 有效的结构连接是XML查询处理的关键。
- The query processor ran out of stack space during query optimization. 查询处理器在优化查询时堆栈空间不足。
- This gives an XML query language additional degrees of freedom for dealing with missing data. 这给了XML查询语言更多自由度来处理丢失的数据。
- By specifying the ROOT option in the FOR XML query, you can request a single, top-level element for the resulting XML, as shown in this query. 通过在FOR XML查询中指定ROOT选项,您可以为生成的XML请求一个顶级元素,如该查询中所示。
- One of the earliest activities of the Query working group was to draw up a formal statement of requirements for an XML query language. Query工作组的早期活动之一就是起草XML查询语言需求的正式声明。
- To exploit this flexibility, an XML query language must provide features for retrieving and interpreting information from these diverse sources. 为了利用这种灵活性，一个XML查询语言应该提供检索和解释不同数据源信息的特征。
- In general, the result of an expression in an XML query may consist of a heterogeneous sequence of elements, attributes, and primitive values, all of mixed type. 一般而言,XML查询表达式的结果可由异构的元素序列、属性和所有混合类型的原始值构成。
- Early in its history, the XML Query Working Group confronted the question of whether XML is sufficiently different from other data formats to require a query language of its own. 在发展早期,XML Query工作组面临的一个问题是,XML是否不同于其他数据格式,并且需要它自己的查询语言。
- ON Any missing statistics required by a query for optimization are automatically built during query optimization. 在查询优化期间,将自动生成优化查询需要但缺少的任何统计信息。
- Within a large number of XML query languages, XQuery is one part of the standard drafts of W3C(World Wide Web Consortium). And it has been used in application widely. 在众多XML查询语言中，XQuery语言是W3C(World Wide Web Consortium，互联网联盟)标准草案的一部分，已经得到了广泛的应用。
- Finally, this discussion of query languages may leave you wondering about a related topic: query optimization. 最后,关于查询语言还有一个相关的主题:查询优化。
- Specifies that the join order indicated by the query syntax is preserved during query optimization. 指定在查询优化过程中保持由查询语法指示的联接顺序。
- You want indexing of XML data for efficient query processing and good scalability, and the use of a first-rate query optimizer. 您希望对XML数据创建索引以实现高效的查询处理和良好的可伸缩性,并使用一流查询优化器。
- The component that does this is called the query optimizer. 处理此过程的组件称为“查询优化器”。
- This makes sure that the plan guide is used by the query optimizer. 这将确保计划指南可由查询优化器使用。
