Case analyses 7-20. ian’s place (the rea model and e-r diagrams)


Ian's situate hawks pet edibles to dog and cat owners. To hawk its products, the marketing portion requires sales personnel to flatter on the pet garner retailers among their assigned geographic territories. Salespeople keep an application on their inconstant phones that allows them to chronicles sales sign and impel these sales sign straightway to the apsharp-end network for updating the appoint's sales apsharp-end polish.

Each day, depot personnel retrospect the popular sales sign in its polish, and where likely, pluck the consequence and apt them for shipment. (Ian's Situate ships consequence via spiritless consigner, and shipping conditions are generally FOB from the shipping sharp-end.) When the shipping portion completes a shipment, it besides notifies the billing portion, which then prepares an invoice for the customer. Liquidation conditions alter by customer, but most are “net 30.” When the billing portion receives a liquidation, the billing clerk credits the customer's recital and chronicless the money common.


  1. Identify the richess, facts, and sovereigns confused in the return rule at Ian's Place.
  2. Develop an E-R diagram for this rule.
  3. Design the tables for this return rule. Note that you earn demand tables for each riches, fact, and sovereign, as well-mannered-mannered as tables for each many-to-many correlativeness.
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