查询词典 query

In this engine, the double-byte inverted index is employed to build an inverted index table with every double bytes of the file name, the automatic classification of query results is used to establish a tree structure of query results based on the search topic, and the automatic error correction is adopted to construct a spelling mistake dictionary with the high-frequency search keywords in user query logs.

双字节倒排是对文件名中每两个字节建立倒排索引表，自动分类是对检索结果按主题划分为层次结构，查询自动纠错是以用户查询日志中的高频查询词为数据源构建拼写错误词典。

Seamless GIS data production method of linear feature and areal feature is introduced primarily, the plan of annotation layout of seamless data is designed, and annotation data structure is set forward too.(5) Comprehensive functional structural diagram of seamless GIS is described, some processes and functions are introduced, these progresses and functions includes data display, graphic auxiliary operation, symbolization, query of spatial, geographical name query and structured query language, three-dimensional visualization display.

分析了无缝GIS数据生产的流程，从程序算法和交互建立图幅间要素的拼接关系两个方面阐述了无缝数据生产的方法，并主要介绍了线状要素和面状要素的无缝数据生产，设计了无缝数据注记配置的方案，给出了注记数据的结构。

The optimization methods of database SQL query were studied and some available query optimization Methods were given out as follows: The incompatible data type should avoid to be used; More redundancy search parameters should be given as join condition in join query; In some condition, the number of note hitted to target was estimated by optimizing implement using the average density; Some other maths operating symbol should avoid to be used as condition parameters in WHERE clause; Some operating symbol and its sentence should avoid to be used also; When the cluster function was used,the WHERE clause should be paied attention to more,and so on.

作者单位：（重庆工学院商贸信息学院，重庆 400050）摘要：数据库SQL查询语句的优化，须注意：避免使用不兼容数据类型；连接查询中应多给连接条件提供一些冗余的搜索参数；某种条件下优化器只能使用其平均密度以估计命中的记录数；避免对WHERE子句中条件参数使用其它数学操作符；避免使用某些操作符及相应语句；聚簇函数的使用应注意WHERE子句。

Because that DBC++ retrieves objects mainly by navigation and methods may be executed during query, the cost of conditional sub-expression of query statement can be used to optimize the execution of query statement.

由于DBC++主要是通过导航搜索数据库中的对象，而且在询问语句中可以执行对象的方法，因而，可以将询问中的条件子表达式的"代价"作为询问优化的依据。

Query requests a semantic analyzing module and a global query processing module to process the case of homograph and thesaurus. A Sub-query localization processing module processes case caused by different measure unit. Redundancy discarding module processes case caused by error of redundancy data.

查询请求语义分析和全局查询阶段处理同形异义和异形同义情况、子查询本地化模块处理计量单位不同所造成的影响、冗余处理阶段根据策略处理有冗余结果集中内存在错误数据所造成的冲突。

I remember reading an AskTom article by Tom Kyte on parallel query that said that this isn't always what you want - you wouldn't for example want individual OTLP users soaking up all resource for regular transactions or queries - but parallel query is an excellent way to effectively use up all the available CPUs and disk units when you've got a particularly big warehouse query.

我记得读过一篇 AskTom 关于并行查询的文章，上面说到并不是总是如你所想象的那个样子–例如你不能想象让单独一个 OLTP 用户为了通常的事务或者查询使用全部的服务器资源–但是并行查询时一种很好的方式来充分使用所有的 CPUs 和磁盘当在一个特别大的数据仓库的查询中。

Parts of current parallel databases support expanding of data types, but all of them lack of theoretical foundation. It is difficult to predicate the performances of parallel query, complicated to optimize parallel query and unattainable to keep the correctness of parallel query optimization This thesis, for the first time, combines monoid algebra system with BSP parallel model systematically, and provides a general-purpose parallel object-relational database systems-PORDBMS.

文章系统地研究了资源分配问题的分解协调理论与方法，给出了非线性分解式模型的构造和有效的求解方法，其中对主问题提出了适应性较强的修正算法，可用于一些难于公式化的问题的模型构造与求解，逐步寻优策略可有效地求解非线性关联约束优化问题。

Except is a set operator which returns a query expression that has all the elements of a query expression but not in another query expression.

除了是一家集商的查询表达式返回一个具有所有内容，包括在查询表达式，但在另一个查询表达式没有。

Processing query with materialized views must find matching of view and query. Arithmetic of query reformulation is proposed.

用具体化视图处理查询，通过发现从视图到查询的匹配来识别查询类型，提出了使用视图的查询重写算法。

In this field, Christian et proposed a Island method in 2005, it is a k nearest neighbor query method of moving objects based on road network,but this method has three flaws which are k nearest neighbor query in constrained road network,traffic-jam exploration and optimize of Island's radius. This article has studied k nearest neighbor query of moving objects based on road network in view of above three aspects ,and proposed the Island+ method, which has made the improvement to the memory structure and trajectory preservation of neighbor objects.

在这一领域，Christian等人在2005年提出了Island方法，它是一种基于路网的移动对象k近邻查询方法，但是这种方法存在以下不足的地方，第一，该方法对路网没有任何限制条件；第二，没有给出明确的数据存储结构；第三，区域半径一致，效率不高。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。