The importance of a conceptual schema for a successful data base design is widely accepted today. Its development remains however a major problem during the logical design of a data base system. A number of problems related to the role, structure and implementation of a conceptual schema for an...
The design of the logical structure of databases using the entity-relationship (E-R) model is considered. The goal is to focus on E-R conditions for desirable logical design, using an extended translation of the full E-R model into the more easily implementable relational database model; all...
Then, from the database logical design and the realization, has carried on the summary to the overall system table of contents organization. 接着,从数据库的逻辑设计及实现,到整个系统的目录机构进行了概括。 zhidao.baidu.com 2. In my thesis, I concentrate the database logical design and physical...
7.This massive autobiographical work was thelogicalculmination of her long career. 这部自传体 宏篇巨制是她漫长事业生涯 必然成果。 8.This paper firstly introduces the theory of normalization and denormalization inlogicaldesign of database. 文中首先论述了数据库 ...
NYU_Database_Systems_Lecture_2_Modeling Rum_Ron 64 0 NYU_Operating_Systems_Lecture_1_Introduction Rum_Ron 319 0 NYU_Database_Systems_Lecture_4_Relational_Databases_in_Architect Rum_Ron 62 0 NYU_Database_Systems_Lecture_10_Logical_Database_Design_With_Normalization_cont. Rum_Ron 80 0 NY...
美 英 un.逻辑数据库设计 英汉 网络释义 un. 1. 逻辑数据库设计
Logical database designis accomplished with a variety of approaches, including the top-down, bottom-up, and combined methodologies. The traditional approach, particularly for relational databases, has been a low-level, bottom-up activity, synthesizing individual data elements into normalized tables after...
You can use the Unified Modeling Language (UML) to create a model of your database design. The Object Management Group is a consortium that created the UML standard. UML modeling is based on object-oriented programming principles. The basic difference between the entity-relationship model and ...
LogicalDatabaseDesign-MappingERDtoRelationalObjectiveTobeableto: TransformanE-R(EER)diagramtoalogicallyequivalentsetofrelations TransformingEERDiagramsintoRelationsTopicsTransformingERDintoRelationsTransforming(mapping)E-Rdiagramstorelationsisarelativelystraightforwardprocesswithawell-definedsetofruleStep1:MapRegularEntities...
文档标签: First form first and Form 系统标签: database normal logical design form anomalies CS430DatabaseTheoryWinter2005LectureDatabaseLogicalLevelLogicalDesignRelationalDatabaseKeyproblems:WhattablesWhatcolumnseachtablehave?Additionalissue:IntegrityConstraintsIntrinsic(Databasedesign),TriggersotherDBMSmechanisms,...