UML建模之数据建模(Data Model Diagram) (TableTrigger)4、表约束(TableConstraint)5、视图(View)6、存储过程(StoredProcedure)三、数据建模实例四、总结一、数据建模简介数据建模不仅可以对象的属性建模(比如E-R图),也可以对数据的行为建模(比如触发器Trigger、存储过程StoredProcedure).在进行数据库设计时,设计到如下...
What is a database diagram? A database diagram shows the logical structure of a database, including the relationships and constraints that determine how data can be stored and accessed. Individual database models are designed based on the rules and concepts of whichever broader data model the de...
In a relational data model, for normalization purposes, year lookup, quarter lookup, month lookup, and week lookups are not merged as a single table. In a dimensional data modeling (star schema), these tables would be merged as a single table called TIME DIMENSION for performance and slicing...
Our entity relationship diagram tool helps you conceptualize your database design before you build it, including the overall structure and the ways different types of data interact, if at all. Import your Salesforce schema Unlike other ER diagram tools, we eliminate the hassle of managing Salesfor...
SAMSTAR displays the resulting star schemas on a computer screen graphically. With this automatic generation of star schema, this system helps designers reduce their efforts and time in building data warehouse schemas.Il-Yeol SongRitu KhareYuan An...
feature model: A feature model is a model that defines features and their dependencies. Basically, there are two kinds of dependencies: the parental relationships, which can be of five types, i.e., mandatory, optional, alternative, AND group cardinality and OR group cardinality; and the cross...
Star39 mysqlpythondatabase-managementerdiagramnormal-formsonline-voting-system UpdatedDec 2, 2022 Python SQL Database implementation of Hospital Management workflow sqlsqlservertsqlerdiagram UpdatedMar 21, 2020 An electron.js application designed to assist you in creating diagrams, especially for MySQL dat...
Star1 Code Issues Pull requests Create a D2 ERD Diagram from your existing postgres schema (golang port) golangpostgresqld2erdiagram UpdatedApr 2, 2023 Go eujoy/erbuilder Star0 Code Issues Pull requests Parse go files and prepare the .er based on the structs defined in the input files. ...
Diese vier Kategorien wurden bei der Erstellung dieses Modells definiert. Mit der Zeit wurde die Geschäftswelt jedoch immer komplexer und es mussten mehr Faktoren berücksichtig werden. Zunächst einmal wurden zwei weitere Kategorien definiert, das sogenannte 6M Schema: Mitwelt (Umwelt): Unter...
chätzen: Sie eröffnet ein großes Arsenal weiterer diagrammatischer Operationen, die neue Sichten auf die Daten generie- ren: The concept of a geometric feature space allows us to take the most basic method of human- ities – a comparision – and extend it to big cultural data....