百度试题 结果1 题目relational database 相关知识点: 试题来源: 解析 关系数据库 反馈 收藏
2.关系数据库(Relational DataBase,RDB) 基于关系模型的数据库。 关系数据库是数据和数据库对象的集合。 概述:由数据表和数据表之间的关联组成。数据表通常由行和列组成的二维表,每个数据表分别说明数据库中某一特定的方面或部分的对象及其属性。数据表中的行表示一条记录和一个对象,代表众多具有相同属性的对象中的...
Integrity constraints specific to a particular relational database must be definable in the relational data sublanguage and storable in the catalog, not in the application programs. Rule 11: Distribution Independence The data manipulation sublanguage of a relational DBMS must enable application programs ...
Noun1.relational database- a database in which relations between information items are explicitly specified as accessible attributes; "in a relational database the data are organized as a number of differently sized tables" computer database,electronic database,electronic information service,on-line da...
Therelational databaseis the most mature and popular database technology nowadays. 关系数据库是当前最成熟、最流行的数据库技术. 期刊摘选 At present, OA is mainly based on two platforms: Groupware andRelational Database. OA体系目前大多基于两种平台: 群件平台和关系型数据库. ...
First Normal Form一个关系模式R的所有属性的域都是原子的(该域的元素是不可分的单元),比如CS00123就不是反例 应该为 Functional Dependency\alpha \&\beta 是属性集满足函数依赖 \alpha \rightarrow \beta…
... database,distribution 分布式数据库 database,relational 相关式数据库 databook 数据手册 ... www.fanyijia.com|基于30个网页 例句 释义: 全部,相关式数据库 更多例句筛选 1. It goes further by mentioning that it could be any type of database: relational (object-relational) or non-relational. ...
relational database capability【计】 关系数据库能力 relational database machine【计】 关系数据库机 相似单词 databasen. (储存在计算机中的)数据库 relationala. 有关系的,有联系的 data basedadj. 以数据为基础,基于数据(的) metadatabase元数据库 ...
一、Relational Database 1. Relational Model Relational Database supportsrelational model. Simply put,a relation is a table. Row is Tuple. And a column of data is domain. Normally a relation has aprimary key, which can determine a single tuple. ...
Data integrity refers to the accuracy, completeness, and consistency of the data in your database. Data integrity includes three specific technical aspects of a relational database’s structure: Entity integrity (or table-level integrity)ensures that a table has no duplicate records, and that the...