Search... Log In Sign Up Data Models of Accounting Information Systems Uploaded by Igli Hakrama 1 of 2: hakrama_ersoy_AB0... top 3% 5‚373 Download Akademik Bilişim’09 - XI. Akademik Bilişim Konferansı Bildirileri 11-13 Şubat 2009 Harran Üniversitesi‚ Şanlıurfa Data Models of Accounting Information Systems REA vs. IAC Igli Hakrama‚ Ahmed Fatih Ersoy Epoka University Computer Engineering Department‚ Tirana / Albania iglihakrama@epoka.edu.al‚ afersoy@epoka.edu.al Abstract:
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Database using an EER Model 4.1 The steps involved in the design of relational database are 1) Developing the conceptual model – Drawing the ER/ EER diagram 2) Transforming the Conceptual model into a set of relations – relational schema and 3) Normalizing the relations. Once ER / EER model has been developed for the application ‚ ER/ EER diagram can be mapped into a relational model . ER/ EER diagram consists of the following components. 1) Entities (Strong ‚ Weak) with
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New Er Digram for BIOIn software engineering‚ an entity–relationship model (ER model) is a data model for describing the data or information aspects of a business domain or its process requirements‚ in an abstract way that lends itself to ultimately being implemented in a database such as a relational database. The main components of ER models are entities (things) and the relationships that can exist among them. Entity-relationship modeling was developed by Peter Chen and published in a 1976 paper
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build a physical database from a logical model 2 Agenda Unary or recursive relationships Entity integrity: Keys Interesting design cases Converting logical model to a physical model 3 Last Class Review JOINS ANSI and traditional join syntax DML insert update delete 4 Unary‚ Recursive‚ Relations A relation where source and target are a same entity Can be 1:N or N:M Manager - Employee Social network relationships Part-subpart 5 Primary Keys The
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Los Angeles‚ CA‚ St. Louis‚ MO‚ and Bayonne‚ NJ‚ Huffman Trucking consulted with Smith Systems Consulting‚ who developed entities and attributes for the Fleet Truck Maintenance database‚ but did not develop the database. Therefore‚ Entity-Relationship Diagrams are needed in order to better document their applications. The following document will detail how the Entity-Relationship Diagrams were developed and why they are necessary in the documentation of Huffman Trucking Fleet Truck Maintenance program
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weak entity types differ and provide an example of each. A strong entity type is an entity type that is not existence-dependent on some other entity type A weak entity type is an entity type that is existence-dependent on some other entity type. States Strong entity weak entity Client is strong entity because it already has primary key and doesn’t depend on any other entity‚ but
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Topics Video - The Career of an Analyst - 25 mins Review Enitity Relationships Review the Concept of Keys Normalisation Objectives - understand the importance of continually learning - appreciate the role of Entity Relationship Diagrams - appreciate the job of a consultant - Entity Relationship Model Revisited Entity Relationships - data at rest - independent of process Consists of -Entity or nouns (objects) - real or abstract - multiple occurrences
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framework into which various stakeholders with different perspectives can organize and view the fundamental building blocks of information systems. Views of knowledge System owners view: Interested not in raw data but in information.(Business entities and business rules)
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Cohen CIS-111 April 15‚ 2013 Advantages of Relational Model The relational model would provide Acme Global with a better understanding of the data needs of their organization. A Relational model offers data independence and efficient access. “The conceptual and external schemas provide independence from physical storage decisions and logical design decisions respectively.” (Ramakrishnan‚ 2007) “The benefits of using the relational model would result in an easy to use‚ flexible‚ high performance
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ASSIGNMENT: Entity Relationship Modelling Introduction: Databases‚ and the database management systems that lord over them‚ are the core information systems technology. They are used---and will be used---to store corporate data‚ web pages‚ on-line movies‚ work flow information‚ document databases---absolutely everything that is of interest to business. This is made simpler and possible through a simple approach called entity relationship (ER) model. The ER Model The ER modelling starts with attributes
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