Platt introduction to e commerce 7200 5000 40 0 235

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Platt Introduction to E-commerce $72.00 5,000 40 0-235-624-6 Rosenberg HTML and Javascript Primer $45.00 6,000 0 Reference Fields Inventory File (Goods and Services) Reference Fields Customer File (External Agents) Customer # Name Address Contact Person Phone 3450 Brownsville, C.C. Brownsville, TX Smith (956) 555-0531 3451 Educate, Inc. Fairhaven, MA Costa (508) 888-4531 3452 Bunker Hill College Bunker Hill, MA LaFrank (617) 888-8510
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Transaction Files Order # Order Date Customer # Status 0100011 05/11/06 3451 Open 0100012 05/15/06 3451 Open 0100013 05/16/06 3450 Open Order # ISBN Quantity 0100011 0-256-23696-7 200 0100011 0-146-18976-4 150 0100012 0-135-22456-7 50 0100012 0-146-18976-4 75 0100012 0-145-21687-7 40 0100013 0-146-18976-4 35 0100013 0-256-23696-7 100 Order file (event) Order Detail (event) Usually include a date Why? Usually include quantity and some times price Why quantity? Price? Since price is in the master file and not the transaction file, what can we conclude?
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Relationships Between Master and Transaction Files Order # Order Date Customer # Status 0100011 05/11/06 3451 Open Order # ISBN Quantity 0100011 0-256-23696-7 200 0100011 0-146-18976-4 150 ISBN Author Title Price Quantity on Hand Quantity Allocated 0-256-23696-7 Barnes Introduction to Business $78.35 4,000 300 0-146-18976-4 Johnson Principles of Accounting $70.00 8,000 260 0-145-21687-7 Platt Introduction to E-commerce $72.00 5,000 40 Customer # Name Address Contact Person Phone 3451 Educate, Inc. Fairhaven, MA Costa (508) 888-4531 Customer File (Master) Order File (Transaction) Order Detail (Transaction) Inventory File (Master)
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Finding Data Find out what types of people, business units, things, places, events, materials, or other organizations are associated with, or interact with, the system and about which data must be maintained. Events Resources Agents Look for forms that are used Don’t ask technical questions! Yes: Tell me what you did today No: What information did you enter in the transaction file?
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Tables, Queries and Reports Load Transaction (Event) data and Master (Agents, Products/Services) data into separate tables Database Management System (DBMS) allows us to request information via a query These queries and tables can be the source of reports Organized and formatted presentation of data Tables Reports Queries
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