对数据库运算有很多并行算法。
There are a lot of investigating on parallel algorithms in database.
这个方法可以利用关系数据库运算实现，而且不要求预先指定类数。
This method can be implemented by the calculation of the relational data base, and it is not necessary to fix Numbers of classes in advance.
大部分数据库系统支持时间戳运算。
为了获得这些数据，您可能需要调用Web服务、连接到数据库、执行复杂的逻辑运算或从多个数据源汇总数据。
To obtain this information, you may invoke a Web service, connect to a database, perform complex logic, or aggregate data from multiple sources.
选择orchestrateSchemadefinitions菜单项将开始使用PX运算符导入文件定义或数据库表模式。
Selecting the Orchestrate schema Definitions menu item starts the process of importing the file definition or database table schema using the PX operators.
Wheeler先生表示，该系统由新的搜索技术、强化的计算机运算性能以及Amadeus拥有的庞大的航空、酒店和景点数据库所推动。
Mr. Wheeler said the system is enabled by new search technologies, increased computer-processing power and Amadeus’s access to large amounts of data about flights, hotels and destinations.
对于Web应用程序，数据源通常是一个关系数据库，其中内置了一些搜索功能(Equality是一个简单的搜索运算符，与SQL运算符like一样)。
For a Web application, the data source is commonly a relational database, which has some forms of search built in. (Equality is a simple search operator, as is the SQL operator LIKE.)
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。
As join operation to relational database, structural join order selection is at the heart of query optimization in an XML database.
本文针对海量离散数据的特点，借鉴分布式数据库、并行运算、网格计算及多线程的思想，提出了一套海量离散数据快速检索方法。
According to the feature of mass discrete data, an efficient retrieval method is stated by referring to the philosophy of distributive database, parallel computing, grid computing and multi-threading.
数据库中多个实体呈树形关联时，对海量数据作多层实体连接运算时要消耗系统大量的内存资源。
Vast memory resource is consumed when great capacity data is retrieved while many layers of entities in a database are re - lated like a tree and join operation is carried out.
此算法只扫描一遍数据库，并且二进制数的位运算速度比候选集与事务记录的比较运算速度要快得多。
This algorithm scans the data base only once and the speed of binary operation is faster than the speed of comparison of item sets and transactions.
针对某行业产品包装中标准托盘包装的利用率低的情况，提出非标准托盘的尺寸设计问题，并运用SQL数据库的运算功能实现了非标准托盘尺寸的优化设计。
According to the low packing ratio in a industry, the nonstandard tray sizes designing problem is proposed, and the SQL database techniques is applied to solve the problem.
基于浸润原理 ，提出智能化并行运算排课系统的体系结构及数据库设计原理和方法 ，分析排课程序的处理过程。
The system structure, principle and methods of database establishment and operation skills of the intellective parallel computing course arrangement system based on soakage are described.
本文通过分析数据库应用系统中常见的几种运算，提出了如何构建SQL语句，才能达到运算的优化，提高系统运行速度。
Based on the analysis to several usual operations in data base application system, the optimized strategy on how to construct SQL sentence to improve operation speed is studied in this paper.
空间连接运算是空间数据库中的一种基本操作，但它也是最复杂、最耗时的操作之一。
Spatial join is one of the most complex and time-consuming operations in spatial database systems.
本文分析了并行数据库中各结点的负载平衡问题，提出了一个高效且保持负载平衡的并行连接运算算法，并进行了模拟实验。
This paper analyses the problems of load balancing on every site in parallel databases, presenting a parallel join algorithm with high efficiency and load balancing and analogue experiments are made.
然而，某种数据库中间件(如：MOCHA)为了减少网络数据传输量，实现查询优化，就把部分代码类迁移到近数据库站点进行数据缩减运算。
However, in order to optimize the query operation, Some database middleware such as MOCHA ship part of codes to the distant sites which are close by the database.
而关系数据库标准查询语言SQL没有除法运算符，不能直接作除法。
However, there are no division symbol in SQL, so the division can not be operated directly.
RMP算法支持SQL基本语句的逆向运算，为数据库测试数据的自动生成提供了更好的支持。
RMP can reversely process the fundamental SQL statements and provide better support to automatic data generation for database system test.
在人脸数据库上的实验结果表明，该算法的运算速度较快，识别准确率较高。
Experimental results on face image databases demonstrate that the proposed algorithm not only has fast running speed, but also achieves higher recognition accuracy.
如果对如何将运算符用于某个特定数据库有疑问，请参见所用数据库的文档。
If you have questions about how to use operators with a particular database, refer to the documentation for the database that you are using.
关系数据库的内部设计是以关系型数学运算为基础的，和这些系统需要一个预先定义的模型和明确的类型。
The internal design of relational databases is driven by relational math, and these systems require an up-front definition of schemas and types that the data will thereafter adhere to.
新算法通过使用旋转数据库和位运算减少了扫描原始数据库的次数，加快了挖掘速度。
The new algorithm reduces the number of scanning the original database through using rotary database and bit operations, and accelerates the speed of data mining.
随着生物序列数据库中序列数据的激增，开发出能够进行大规模运算的并行算法就显得非常迫切。
Because sequence data increase rapidly in biology sequence database, it is very exigent to develop algorithms that have high efficiency.
在地理信息系统ARC/INFO支持下 ，根据通用土壤流失方程式 （ USL E）对数据库实施运算操作 ，预测了芋子沟小流域土壤侵蚀量。
By the support of ARC/INFO geographical information system and integration of GIS and USLE, the soil erosion amount of Yuzigou small watershed was predicted.
在地理信息系统ARC/INFO支持下 ，根据通用土壤流失方程式 （ USL E）对数据库实施运算操作 ，预测了芋子沟小流域土壤侵蚀量。
By the support of ARC/INFO geographical information system and integration of GIS and USLE, the soil erosion amount of Yuzigou small watershed was predicted.
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