Defining standard stream query languages.
定义流查询语言的标准。
Text files do not support SQL Query languages.
文本文件不支持SQL查询语言。
Query languages make it easier for users to deal with databases.
询问语言使用户更容易对数据库进行操作。
Analyzing the data mining primitives, query languages, and system architectures.
分析了数据挖掘原语、查询语言和系统结构。
Navigating XML queries by path expression is the common characteristic of XML query languages.
利用路径表达式导航XML查询是XML查询语言的共同特点。
The derived relational algebra operators are widely used in the relational database query languages.
关系代数的派生算子在关系数据库查询语言中得到了广泛应用。
Path expression is a common feature of XML query languages. Many indexing methods have been proposed.
路径查询是XML查询的一个主要特征，现已提出了多种XML索引方法。
Now DB2 can query this data using SQL/XML and XQuery languages by using the nicknames created for the view.
现在DB2可以使用SQL/XML和XQuery语言通过为视图创建的别名来查询数据。
The common feature of the XML query languages is the use of regular path expressions (i. e. RPE) to query XML data.
各种XML查询语言的共同特点就是利用正则路径表达式(RPE)来导航XML文档的查询。
Some of such query languages are based on algebra, some are based on calculations, others are based on logic programming.
这些语言有些是代数结构的，有些是基于演算的，还有的是面向逻辑程序设计的。
This paper introduces the basic concepts of logical query languages for databases and the methods on evluation of queries.
介绍数据库逻辑询问语言的基本概念和询问求值的方法，并扼要介绍逻辑询问语言的研究现状和研究方向。
SPARQL builds on previous RDF query languages such as rdfDB, RDQL, and SeRQL, and has several valuable new features of its own.
SPARQL构建在以前的rdf查询语言(例如rdfdb、RDQL和SeRQL)之上，拥有一些有价值的新特性。
Object query languages still do not relieve you from having to know SQL, since you often need to know how to fine tune query languages.
对象查询语言仍不能免除必须了解SQL，这是因为通常需要了解如何调优查询语言。
How to process user defined functions incorporated in declarative query languages efficiently is an important aspect of query optimization.
如何高效地处理说明性查询语言中嵌入的用户自定义函数，是查询优化的一个重要内容。
Indeed, applications can freely employ statements from both query languages, and a single query statement can actually incorporate both SQL and XQuery.
实际上，应用程序可以自由地使用这两种语言的语句，而且一个查询语句可以结合使用SQL和XQuery。
Among the many query languages, Structured query language (SQL) is a language designed and optimized for querying certain kinds of relational databases.
在众多查询语言之中，结构化查询语言(SQL)是一种针对查询特定类型的关系库而设计和优化的语言。
In order to effectively analyze and process these XML data, researchers have proposed various query languages and storage managing techniques of XML.
为了有效地加工、分析和处理XML数据，国内外学者已经提出了各种XML的查询语言和存储管理技术。
Path expression is one of the core components of most XML query languages. However, there are few researches on the issue of path expression optimization.
路径表达式是XML数据查询语言的核心部分，但是目前针对路径表达式本身进行优化的研究却相对较少。
The extensions enable construction of compositional APIs that have equal expressive power of query languages in domains such as relational databases and XML.
这些扩展使得结构性API构造具有与其他领域（如关系数据库和XML）中查询语言同等的表达能力。
Based on this model, this paper constructs two different kinds of medium relational database query languages: medium relational calculus and medium relational algebra.
给出了中介关系数据模型，在此基础上构造了两类不同的中介关系数据库查询语言：中介关系演算和中介关系代数。
XML-based query languages are constructed to reach any arbitrary position within an XML document's "graph" using sequences of edge labels and delimiters representing a path.
基于XML的查询语言被构造来，使用表示路径的边标签和定界符序列达到XML文档图中的任意位置。
Users do not have to master the complex query languages; nor do they have to be aware of the database schema. They only need to enter the keywords to perform a database query.
用户不需要掌握复杂的结构化查询语言，也无需了解数据模式，只需要输入查询关键词就可以进行数据库的查询。
The expressive power of XQuery is comparable to the criterion of "relational completeness" defined for database query languages, though no such formal standard has been defined for an XML data model.
XQuery的表达能力可以与为数据库查询语言定义的“关系完整性”标准相比，虽然还没有为XML数据模型定义这样的正式标准。
It is well known that object-oriented DBMS (database management system) can provide a rich expressive power for the query languages to meet various needs of some high-level database applications.
论述了一种面向对象的数据库管理系统的直观对象查询语言。
The basic optimization methods of the SQL query language is presented by comprehending executive tactics of RDBMS optimizer and analyzing the factors that affect the SQL query languages efficiency.
介绍RDBMS优化器的执行策略和分析了影响SQL查询效率的因素的基础上，提出了优化SQL查询效率的基本方法，以提高数据库查询的执行效率。
But, our experience shows that nesting the two languages more than one level deep is usually not needed to express the desired query logic.
但是，我们的经验显示，表达所需的查询逻辑通常并不需要两种语言的嵌套层次超过一层。
The monitoring management module, which adopts advanced programming languages, performs the functions of data collection, exchange, disposal, query and report print and so on.
监测管理模块通过高级语言编程完成了数据采集、交换、处理、查询及报表打印等功能。
Easy to use classical languages source code. . Available to the novice learn how to prepare a progress download, IP query browser!
说明：用易语言编写的经典源代码…提供给新手学习如何编写进度下载、IP查询器！
Describes the three parts of the basic LINQ query operation that are common across all languages and data sources.
介绍所有语言和数据源共有的基本LINQ查询操作的三个部分。
At present, the industrial circles and academic made a lot of XML query language, grammatical forms and query capabilities in various languages are different.
目前，工业界和学术界提出了很多种XML查询语言，各种语言在语法形式和查询能力上都不尽相同。
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