连接计划指示,强制优化器使用指定的连接方法来连接查询中的表,要么是嵌套循环连接、分类合并连接,要么是动态哈希连接。
Join plan directives that force optimizer to use the designated join method to join tables in the query, either nested loop join, sort merge join, or dynamic hash join.
最常用的连接方法就是嵌套循环连接、分类合并连接和动态哈希连接。
The most commonly used join methods are nested-loop join, sort merge join and dynamic hash join.
分类,合并以及比较的概念
如果一个分类总是属于一个且只属于一个分类,那么这两个层次就应该合并。
If a category always drills to one and only one category then the two levels should be merged.
一旦实现了对行的分类,连接两个表的算法就十分容易:数据库服务器仅仅连续地读取两个已分类表,并合并所有相匹配的行。
Once the rows are sorted, the algorithm for joining the two tables is easy: the database server simply reads both sorted tables sequentially and merge all rows if they are matching.
在另一种情况下,另一个应用程序可能会生成应该合并进企业分类法的词汇。
In another case, another application might generate terms that should be incorporated into the enterprise taxonomy.
哈希连接通常比分类合并连接快,因为它没有涉及到分类操作。
A hash join is usually faster than a sort merge join since there is no sort operation involved.
不管情况怎样,我们总是很快把事情分类合并然后剔除掉令我们不舒服的部分,我们并不理解它们,我们像受到恐吓般的不牢靠。
Anyway, a lot of times we are quick to lump things together or dismiss them as weird when they make us uncomfortable, we don't understand them, we're intimidated or insecure.
合并(分类)行为和认知
搜索和浏览Portlet允许门户用户查询集合并浏览相关联的分类。
The search and browse portlet enables portal users to query collections and browse associated taxonomies.
可合并数千个营运单位的多重不同分类帐(ledgers)到一个共同的会计科目表架构。
Consolidate thousands of accounts into a common chart-of-accounts structure.
该系统的核心部分是刻面分类模式合并处理单元。
The core of the system is faceted classification schema merging process unit.
首先采用模式聚合理论进行特征抽取,将对文本分类具有相似贡献的特征合并,映射为新的特征空间。
Firstly, using pattern aggregation theoretical models to extract features, merge the features which have the similar contributions to text classification, then a new mapping feature space is formed.
声调的分化与合并类型往往因语言或方言的不同而异,因此具有语言或方言分类的意义。
The splitting and merger of tone categories vary among languages or dialects. Hence, it can contribute to the typological classification of languages or dialects.
合并处理单元由注册信息管理模块、刻面分类模式管理模块和统一刻面分类模式管理模块三部分组成。
The merging process unit is composed of register information management module, faceted classification schema management module and unified faceted classification schema management module.
基于委员会的方法试图通过合并多个弱分类器建立一个有效的委员会来构造一个更加有效的分类器。
The voting algorithms try to form a powerful classifier by combining multiple weak classifiers as a council of base-classifiers.
目的依据5型3度分类法治疗83例不同程度大面积皮肤撕脱伤以及合并的不同创伤。
Objective: According to 5 types and 3 degrees, to treat different degree large area avulsion skin injuries on 83 patients due to suffering from the different trauma.
选择性集成分类算法虽能提高集合分类器在整体数据集上的分类性能,但针对某一具体数据进行分类时,其选择出的个体分类器集合并不一定是最优组合。
Selective ensemble classifiers can improve classification accuracy rate of data set. But for a specific data classification, the classifiers contained by ensemble can not be the best combination.
本文以北京工商大学图书馆为例,阐述了合并院校图书馆在期刊分类工作中存在的主要问题,提出了一些解决问题的办法。
This paper investigated and analyzed the current resources of journals in Guizhou university for nationalities, and proposed some ways for periodical construction serving for discipline construction.
负责销售报表包括中国大陆分类账及美国账目合并对应;
Focus on sales transaction including the PRC ledger and US GAAP adjustment;
负责销售报表包括中国大陆分类账及美国账目合并对应;
Focus on sales transaction including the PRC ledger and US GAAP adjustment;
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