Mapping from E-R Model to Relational Model

Mapping from E-R Model to Relational Model. Yong Choi School of Business CSUB. Objectives of logical design. Translate the conceptual design into a logical database design that can be implemented on a chosen DBMS Input: conceptual model (ERD) Output: relational schema, normalized relations

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EER: Enhanced E-R Model

EER: Enhanced E-R Model. Specialization / Generalization SubClass / SuperClass. Subclasses for Different Roles. SuperClass: Staff SubClasses: Manager SalesPersonnel Secretary. Common and Different Attributes. SuperClass:

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The E-R Model

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การออกแบบโครงสร้างฐานข้อมูลด้วย E-R Model และการแปลงเป็นรีเลชัน

การออกแบบโครงสร้างฐานข้อมูลด้วย E-R Model และการแปลงเป็นรีเลชัน. E-R Model = Entity Relationship Model นำมาเขียนแสดงเป็นแผนภาพ เรียกว่า ERD (Entity Relationship Diagram). จุดเด่นของ E-R Model. - ช่วยให้การอกแบบได้ง่ายขึ้นด้วยการจัดระเบียบความคิดของคนที่ทำการออกแบบ

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TOTAL’s R&D Model

TOTAL’s R&D Model. Prof. Philippe A. Tanguy Vice President , R&D Programs, Partnerships and International Relations Total S.A. An International Group with Global Dimensions. 92,855 employees Over 130 countries. Upstream. Downstream. Chemicals. No.1 refiner-marketer

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บทที่ 2 E-R Model (Entity Relationship Model)

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E-R Model

E-R Model. A database can be modeled as: a collection of entities, relationship among entities. An entity is an object that exists and is distinguishable from other objects. Example: specific person, company, event, plant Entities have attributes

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Model-based Clustering in R

Model-based Clustering in R. Tianxi Dong. Theoretical model. Heuristic methods. How many clusters we need? How to compare the performance between methods? How to deal with outliers in heuristic methods? Solution???. Model-based Method.

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E-R Model

E-R Model . The E-R model is not intended to be associated with any particular database model. E-R diagrams are intended to allow humans the ability to capture more of the application ’ s meaning. History of E-R Model.

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Entity – Relationship Model (E-R Model)

Entity – Relationship Model (E-R Model). Entity – Relationship Model. The overall logical structure of a database can be expressed graphically using E-R diagrams. Features of E-R Model This is used to give structure to the data . Model can be evolved independent of any DBMS

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Enhanced E-R Model

Enhanced E-R Model. EER. Digunakan untuk menangani hubungan supertipe/subtipe Supertipe adalah suatu entitas yang bersifat umum Subtipe adalah suatu entitas yang merupakan pengkhususan dari supertipe Contoh: MOBIL dapat menjadi supertipe

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Entity-Relationship (E-R) Model

Entity-Relationship (E-R) Model. COURSE #. CTITILE. PROF. SCHED. ROOM. COURSE. ENROLL. GRADE. STUDENT. SNAME. CREDITS. STUID. MAJOR. * Sometimes it’s natural to classify the entities in an entity set into subclass, then we will use Class Hierarchies. Class Hierarchies. name. lot.

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Mapping from E-R Model to Relational Model

Mapping from E-R Model to Relational Model. Yong Choi School of Business CSUB. Objectives of logical design. Translate the conceptual design into a logical database design that can be implemented on a chosen DBMS later Input: conceptual model (ERD)

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E-R model

E-R model. Entity - Relationship Model. Model Entiteti - Veze. E-R model.

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E-R Model to R elational Model

E-R Model to R elational Model. E-R Model to R elational Model. Entity Sets to Tables Main Idea Each entity set maps to a new table Each attribute maps to a new table column Each relationship set maps to either new table columns or to a new table.

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E-R Model

E-R Model. EER. Digunakan untuk menangani hubungan supertipe/subtipe Supertipe adalah suatu entitas yang bersifat umum Subtipe adalah suatu entitas yang merupakan pengkhususan dari supertipe Contoh: MOBIL dapat menjadi supertipe SEDAN, MINIBUS, JIP dapat berkedudukan sebagai subtipe.

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The ( Q , r ) Model

The ( Q , r ) Model. Assumptions. Demand occurs continuously over time Times between consecutive orders are stochastic but independent and identically distributed ( i.i.d. ) Inventory is reviewed continuously Supply leadtime is a fixed constant L

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SAP R/3 integration model

FI Finanč- nictví. SD Odbyt. MM Materiálové hospodářství. CO Controlling. PP Plánování výroby. AM Správa in- vest. majetku. R/3. Client / Server ABAP/4. PS Projekční systém. QM Management jakosti. PM Údržba. WF Workflow. HR Lidské zdroje. IS Odvětvová řešení.

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The Cox model in R

The Cox model in R. Gardar Sveinbjörnsson, Jongkil Kim, Yongsheng Wang. OUTLINE. Recidivism data Cox PH Model for Time-Independent Variables in R Model Selection Model Diagnostics Cox PH Model for Time-Dependent Variables in R Summary. 18,April 2011. Department of Mathematics, ETHZ.

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CONCEPTS OF E-R MODEL

CONCEPTS OF E-R MODEL. CONTENTS Entity Attributes Data Value Entity Types Types of Entity Types Relationships Relationship Constraints. Entity

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Practical Model Selection and Multi-model Inference using R

Practical Model Selection and Multi-model Inference using R. Modified from on a presentation by : Eric Stolen and Dan Hunt. Theory. This is the link with science, which is about understanding how the world works.

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E-R MODEL

Entity-Relationship and Enhanced Entity-Relationship Conceptual Data Models (Chapters 7 & Sections 2.1 to 2.3). E-R MODEL. E-R model is based on a real world that consists of entities and relationships. It consists of two primitives:

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