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CSCV 460

2021-10-14 05:46:55 0n65ki4a

CSCV 460 Assignment: Data Modeling and
Mapping

  1. (30 points) Consider the following set of requirements for a university
    database that is used to keep track of students’ transcripts.
    (a) The university keeps track of each student’s name, student number,
    social security number, current address and phone, permanent
    address and phone, birth-date, sex, class (freshman, sophomore,
    ..., graduate), major department, minor department (if
    any), and degree program (B.A., B.S., ..., Ph.D.). Some user applications
    need to refer to the city, state, and zip of the student’s
    permanent address, and to the student’s last name. Both social
    security number and student number have unique values for each
    student.
    (b) Each department is described by a name, department code, office
    number, office phone, and college. Both name and code have
    unique values for each department.
    (c) Each course has a course name, description, course number, number
    of semester hours, level, and offering department. The value
    of course number is unique for each course.
    1
    (d) Each section has an instructor, semester, year, course, and section
    number. The section number distinguishes different sections of
    the same course that are taught during the same semester/year;
    its values are 1, 2, 3, ...; up to the number of sections taught
    during each semester.
    (e) A grade report has a student, section, letter grade, and numeric
    grade (0, 1, 2, 3, 4 for F, D, C, B, A, respectively).
    Design an ER schema for this application, and draw an ER diagram for
    that schema. Specify key attributes of each entity type and structural
    constraints on each relationship type. Note any unspecified requirements,
    and make appropriate assumptions to make the specification
    complete.
  2. (20 points) Design and ER schema for keeping track of information
    about votes taken in the U.S. House of Representatives during the current
    two-year congressional session. The database needs to keep track
    of each US state’s Name (e.g., ‘Arizona’, ‘Texas’, ‘California’) and
    include the Region of the statement (whose domain is {‘Northeast’,
    ‘Southeast’, ‘Southwest’, ‘West’}). States have between one (AK, DE,
    MT, ND, SD, VT, and WY) and 52 (CA) representatives. There
    are 435 congresspersons in the U.S. House of Representatives. Each
    CONGRESS PERSON in the House of Representatives is described
    by his or her Name, plus the District represented, the Start date
    when the congressperson was first elected, and the political Party to
    which he or she belongs (whose domain is {‘Republican’, ‘Democrat’,
    2
    ‘Independent’, ‘Other’}). The database keeps track of each BILL
    (i.e., proposed law), including the Bill name, the Date of vote on
    the bill, whether the bill Passed or failed whose domain is {‘Yes’,
    ‘No’}, and the Sponsor (the congressperson(s) who sponsored—that
    is, proposed—the bill). The database keeps track of how each congressperson
    voted on each bill (domain of Vote attribute is {‘Yes’,
    ‘No’, ‘Abstain’, ‘Absent’}. Draw an ER schema diagram for this application.
    State clearly any assumptions you make.
  3. (20 points)
    Try to map the schema in Figure 1 into an ER schema. This is part of
    a process known as reverse engineering, where a conceptual schema is
    created for an existing implemented database. State any assumptions
    you make.
  4. (30 points)
    Figure 2 shows an ER schema for a database that may be used to keep
    track of transport ships and their locations for maritime authorities.
    Map this schema into a relational schema, and specify all primary keys
    and foreign keys.
    NOTES: Please turn in your completed work to D2L Data Modeling and Mapping.
    WX:codehelp

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