In a relational database 翻译结果4复制译文编辑译文朗读译文返回顶部 In a relational database 翻译结果5复制译文编辑译文朗读译文返回顶部 In relational database 相关内容 aI wouldn't buy that story 我不会买那个故事[translate] aNative speakers of English tend to speak very fast 英语说母语的人倾向于非...
2个以上relation进行join,可以复用此过程,即A与B首先进行join,生成的中间结果再与C进行join。具体执行时倒不必等到A与B完全join完成之后在与C进行join,可以用流水线的方式,每生产一个中间结果tuple就与C进行匹配。除非中间结果需要按照特定column排序后才能同C进行join,这种情况就需要先将中间结果做物化并排序,无法使...
执行machine code,过程中会调用RSI(Relational Storage Interface)接口,访问RSS存储层获取数据,RSI接口是OPEN -> NEXT -> CLOSE的方式,每次获取一个tuple。 RSS (Relational Storage System) 按page组织tuple数据,分为data page/index page,tuple不跨page,page逻辑上组成segment,一个segment可包含多个relation的page,rel...
[translate] aIn a(n) relational database, relationships are specified by joining common data stored in the fields of records in different tables. 在a (n)关系数据库,关系通过加入在存放的共同的数据指定纪录领域用不同的桌。 [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯...
论文笔记:Access Path Selection In A Relation Database Management System 这篇文章是 1979 年由 IBM 发表的。主要介绍了 System-R 系统的查询优化器设计。 二. Processing Of An SQL Statement
B、 Normalize the data before importing to a database C、 Identify the data needed to run the business D、 Cleanse the data before importing it to any database 查看答案 单选题What are the relationships that the relational database is named for?
You can drag a relational database layer onto the map to automatically create a query layer, or use the Add Data button on the Map tab to create a query layer in a map in ArcGIS Pro. Tip: This page explains how to create a query layer for a table in a relational database. To acc...
This is a method for accessing and updating views and other relations of a relational database that: (1) does not require any distinction between base and derived expressions of the data elements; (2) provides data independence; (3) ensures predictable behavior of all updates; and, (4) ...
Question: In a relational database, what is a foreign key?a) A key that uniquely identifies a record within its tableb) A key that is used to speed up searchesc) A key used to link two tables togetherd) A key that can acc...
Getting binary data into a relational database might seem like a bit of a contradiction—doesn’t everything in a relational database have to be table-based? Yes, but you can put binary data into a special type of table column. This level of clever flexibility has allowed relational databa...