UPS prides itself on having up-to-date information on the processing and current location of each shipped item. To do this, UPS relies on a company-wide information system. Shipped items are the heart of the UPS product tracking information system. Shipped items can be characterized by item number (unique), weight, dimensions, insurance amount, destination, and final delivery date. Shipped items are received into the UPS system at a single retail center. Retail centers are characterized by their type, unique ID, and address. Shipped items make their way to their destination via one or more standard UPS transportation events (i.e., flights, truck deliveries). These transportation events are characterized by a unique schedule Number, a type (e.g, flight, truck), and a delivery Route.

The ERD example captures this information about the UPS system. Be certain to indicate identifiers and cardinality constraints.

 

Many-to-Many Relationship A many-to-many relationship is split into a pair of one-to-many relationships, connecting with a linked entity. Entity Shipped Item ItemNum inte ger(10) IG Retail CenterID II Weight A Dimension A InsuranceAmt E Destination A FinalDeliveryDate date integer(10) numeric( 19, 0) N Retail Center Primary Key (PK) 9 ID inte ger (10) varchar(255) N I Add ress varchar(255) N Type numeric(19, 0) IN Transportation Event SeqNumber inte ger(10) Type I DeliveryRout varchar(255) N Column numeric(19, 0)N varchar(255) varchar(255) N One-to-Many Relationship I Item Transportation * Transportation EventSeqNumber integer(10) * Shipped ItemltemNum inte ger(10) Zzzzz