ER-Model: Reduction of E-R Schema to Tables
A database that conforms to an E-R database schema can be represented by a collection of tables. For each entity set and for each relationship …
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A database that conforms to an E-R database schema can be represented by a collection of tables. For each entity set and for each relationship …
The data which is stored in the database at a particular moment of time is called an instance of the database. The overall design of …
Entity Relationship Diagram, also known as ERD, ER Diagram or ER model, is a type of structural diagram for use in database design. An ERD …
Mapping Constraints A mapping constraint is a data constraint that expresses the number of entities to which another entity can be related via a relationship …
The ER model defines the conceptual view of a database. It works around real-world entities and the associations among them. At view level, the ER …
An object relational database management system (ORDBMS) is a database management system with that is similar to a relational database, except that it has an …
It takes more than storage of programming language objects. Object DBMS’s increase the semantics of the C++ and Java. Introduction to Object based databases Object …
Relational data model is the primary data model, which is used widely around the world for data storage and processing. This model is simple and …
A network databases are mainly used on a large digital computers. It more connections can be made between different types of data, network databases are …
Hierarchical databases: It is very fast and simple. In a hierarchical database, records contain information about their groups of parent/child relationships, just like as a tree …