The Pizza Company Inventory Tracking Database - Njit.edu

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Relationships The Pizza Company Inventory Tracking Database 6 Relationships describe how entities are associated with each other. There are three types of relationships, one to one, one to many, and many to many. These relationships define how entity instances relate. Relationships also provide us with critical information about entity interactions. In this project, there are six relationships. There is a relation of one to many between Ingredients and Ingredient_Categories. The relationship between Orders and Delivery_Method and Orders and Employees are each one to one. The relationship between Orders and Suppliers is one to many because sometimes a request for ingredients from manufacturing contains items from one or more suppliers. Orders to Suppliers (items purchased) are always one order submitted to one supplier. The Inventory_Transaction table has a many to one relation to Ingredients and also a many to one relation to Orders. The five relationship names are: � Delivery_Method_Orders � Ingredient_Ingredient_Category � Inventory_Transaction_Ingredients � Inventory_Transaction_Orders � Orders_Employees � Orders_Suppliers Cardinality In general, each relationship can also have a minimum and maximum cardinality associated with it to show which relationships are optional, which are mandatory, and any numerical limitations on these relationships. The cardinality for this database is: � Delivery_Method_Orders is 1:1 � Ingredient_Ingredient_Category is 1:1 � Inventory_Transaction_Ingredients is 1:1 � Inventory_Transaction_Orders: 1:N � Orders_Employees: is N:1 � Orders_Suppliers is 1:1
Entity-Relationship (E-R) Diagram The Pizza Company Inventory Tracking Database 7 To document the Pizza Company database, we used the following Entity-Relationship (E-R) diagrams. The following diagram graphically depicts the various relationships, the associated cardinality, and the entity classes of the relationship. Inventory_Transactions PK Inventory_Transaction_ID I1 Inventory_Transaction_Date FK3,I2 Ingredient_ID FK4 Order_ID Inventory_Transaction_Description Unit_Price Units_Ordered Units_Received Units_Sold Units_Shrinkage Ingredients PK Ingredient_ID I1 Ingredient_Name Ingredient_Description FK2,I2 Ingredient_Category_ID Unit_Price Unit_Size Reorder_Level Discontinued Lead_Time The Pizza Company Inventory Tracking ERD PK Order_ID Orders Order_Number Order_Description FK9,I1 Supplier_ID FK6,I4 Employee_ID I3 Order_Date_Time Promised_Ready_Date_Time Delivery_Date_Time FK4 Delivery_ID Delivery_Charge Ingredient_Categories PK Ingredient_Category_ID I1 Ingredient_Category_Name Suppliers PK Supplier_ID I2 Supplier_Name Contact_Name Contact_Title Address City State I3 Zip_Code Phone FAX Payment_Terms Remarks Delivery_Methods PK Delivery_ID Delivery_Method Employees PK Employee_ID First_Name I1 Last_Name Title Work_Phone Extension
Page 1 and 2: The Pizza Company Inventory Trackin
Page 3 and 4: Abstract The Pizza Company Inventor
Page 5: Elements of the Database Tables / E
Page 9 and 10: Employee Table Table Column Keys Em
Page 11 and 12: Ingredient_Category Table Table Col
Page 13 and 14: Orders Table Table Column Keys Data
Page 15 and 16: Business Functions Forms - General
Page 17 and 18: Forms - Columns / Display Names The
Page 19 and 20: The Pizza Company Inventory Trackin
Page 21 and 22: Summary The Pizza Company Inventory

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