Tài liệu Activity 6.1: Translating the Logical Data Design pdf

Activity 6.1: Translating the Logical Data Design In this activity, you will evaluate the logical design for part of the solution developed for the Ferguson and Bardell, Inc. case study. From this design, you will determine the tables, columns, data types, and keys that are appropriate for the solution. Objectives After completing this activity, you will be able to: ! Evaluate a logical data design. ! Determine the appropriate data types for columns in a table. ! Produce a physical data design. Before You Begin This activity is completed individually, with a class discussion to follow. Time to complete this activity: 30 minutes 30 Activity 6.1: Translating the Logical Data Design Exercise 1: Deriving a Physical Data Design from a Logical Data Design In this exercise, you will use the logical data design presented below and derive a physical data design. This picture is file v05_1609a_act52-answer.vsd or .bmp TypeID (FK) FirstName MiddleInitial LastName Address1 Address2 City State Zip SSN E-Mail Salary BillableRate EmployeeID (PK) Employee ClientID (FK) EmployeeID (FK) JobID (FK) TaskID(FK) Date Expenses TotalHours BillableHours Description TimesheetID (PK) Timesheet ClientID (FK) TimesheetID (FK) Date Amount Work Description InvoiceID (PK) Invoice Name Address1 Address2 City State Zip ClientID (PK) Client EmployeeID (FK) Make Model VIN Year BeginMileage EndMileage VehicleID (PK) Vehicle Is Issued Completes Is Made From 1 1 ∞ ∞∞ ∞ Is Sent To 1 0 ∞ ∞∞ ∞ Contracts With 1 1 ∞ ∞∞ ∞ JobDesc JobID (PK) Job Bills Time To Bills Time To VehicleID (FK) MaintenanceCost MaintenanceDesc MaintenanceDate MaintenanceMiles MaintID (PK) VehicleMaint Can Have 0 ∞ ∞∞ ∞ 1 1 1 ∞ ∞∞ ∞ TypeDesc TypeID (PK) EmployeeType Is Classified As 1 1 1 ∞ ∞∞ ∞ 1 1 ∞ ∞∞ ∞ ClientID(FK) EmployeeID(FK) StartDate EndDate Description ContractID(PK) Contract Purchases 1 1 0 ∞ ∞∞ ∞ TaskDesc TaskID (PK) Task Has 1 ∞ ∞∞ ∞ 0 ∞ ∞∞ ∞ 0 ∞ ∞∞ ∞ 1 ∞ ∞∞ ∞ Activity 6.1: Translating the Logical Data Design 31 ! Derive the physical data design 1. Using the following table templates, translate each entity into a table. You can have more tables than entities, and you might not need all the templates. 2. For each table, translate each attribute into a field. You can have more fields than attributes, and you might not need all the rows in the templates. 3. Select a data type for each field. 4. Label all primary and foreign keys as follows: Primary Key (PK) Foreign Key (FK) Solution found in file v06_1609a_act61-answer.vsd or .bmp Answer Key: Int Integer Currency Currency DInt Double Integer Date Date VChar Variable Character Float Floating Point Number (N) Not Null field Next, you will present your findings to the class. Table Field Data type 32 Activity 6.1: Translating the Logical Data Design Table Field Data type Table Field Data type Table Field Data type Activity 6.1: Translating the Logical Data Design 33 Table Field Data type Table Field Data type THIS PAGE INTENTIONALLY LEFT BLANK Table Field Data type 34 Activity 6.1: Translating the Logical Data Design Table Field Data type Table Field Data type Table Field Data type . Activity 6. 1: Translating the Logical Data Design In this activity, you will evaluate the logical design for part of the solution developed for the. this activity: 30 minutes 30 Activity 6. 1: Translating the Logical Data Design Exercise 1: Deriving a Physical Data Design from a Logical Data