04_Data_Modeling

04_Data_Modeling - Overview Databases REA Models Resources,...

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1 Data Modeling Lect 4 ` Databases ` REA Models ` Resources, Events, Agents ` RE Diagram – Sales ` RE Diagram - Purchasing Overview RE Diagram Purchasing 2 ` Collections of related data ` Fields ` Records ` Tables ` Database Databases 3 ` Identify business and economic events ` ` Identify relationships among entities ` Create ER diagrams ` Identify attributes of data entitie REA Models Identify attributes of data entities ` Create database tables and records 4 ` Economic – impact financial statements ` Sale on account ` Purchase of inventory on account ` Business – impact an organization in a value-added way ` Sales order Events ` Purchase order 5 Resources ` Events use or generate resources ` Object of value associated with an event ` Object of interest to collect information ` Examples: ` Inventory 6 ` Cash ` Not examples: ` Accounts receivable
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2 Agents ` Agents are the “who” associated with events 7 ER Diagrams 8 ER Diagram - Sales
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This note was uploaded on 01/20/2010 for the course ECON econ185 taught by Professor M. during the Fall '09 term at UCSB.

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04_Data_Modeling - Overview Databases REA Models Resources,...

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