Data Modeling and Data Models

Hierarchical Model = Data model based on trees Network Model = Data model based on graphs with records as nodes and relationships between records as edges Data Models = Simple representations of complex real-world data structures File System = Example

Data Modeling = Iterative and progressive process of creating a specific data model for a determined problem domain Database Systems = Design, Implementation, & Management File System = Example Implementation Database Models = Hierarchical Model : data model based on trees. Network Model: data model based on graphs with records as nodes and relationships between records as edges.

Cengage Learning = All Rights Reserved Publicly Accessible Website = May not be scanned, copied or duplicated, or posted Data Models = ©2015 Cengage Learning Database System vs. File System = Database Systems: Design, Implementation, & Management: Rob & Coronel S511 Session 2, IU-SLIS

<p>Relational Model = Based on tables E-R Model = Based on entities and their relationships Hierarchical Model = Example Database Systems: Design, Implementation, &amp; Management Network Model = Figure 1.10</p> Signup and view all the answers

<p>Relational Model = Supports data manipulation language E-R Model = Easy to understand and design Hierarchical Model = Limited constraint representation Network Model = Loss of information content occurs when attributes are removed from entities to avoid crowded displays</p> Signup and view all the answers

<p>Relational Model = Loss of information content occurs when attributes are removed from entities to avoid crowded displays E-R Model = Limited relationship representation Hierarchical Model = Based on tables Network Model = No data manipulation language</p> Signup and view all the answers

<p>Relational Model = Tables E-R Model = Entities and their relationships Hierarchical Model = Example Database Systems: Design, Implementation, &amp; Management Network Model = Figure 2.3 - The ER Model Notations</p> Signup and view all the answers

<p>Relational Model = ©2015 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in E-R Model = ©2015 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in Hierarchical Model = ©2015 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in Network Model = ©2015 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in</p> Signup and view all the answers