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Database

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Computer Science

School

ST Xaviers College

Type

Homework

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Vafvqre47

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HW #1

#1. Design an 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 U.S. STATE’s Name (e.g., ‘Illinois’, ‘Texas’, ‘New York’) and include the

Region of the state (whose domain in {‘Northeast’, ‘Midwest’, ‘Southeast’, ‘Southwest’,

‘West’}). 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’,

‘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 also 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.

ER Design

STATES – state_name (primary key), region

CONGRESS_PERSON – congress_person_id (primary key), state_name (foreign key),

congress_person_name, district_represented, start_date, political_party (it is possible several

congress persons might have the similar name, so a unique congress_person_id will be used as a

primary key)

BILL – bill_id (primary key), bill_name, date_of_vote, passed_or_failed, sponsor (congress

person id, foreign key)

(It is possible the same bill might appear several times in the database, so a bill_id will be used

as a primary key)

CONGRESS_PERSON_VOTES – congress_person_id (foreign key), bill_id (foreign key), vote

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ER Diagram

#2. A database is being constructed to keep track of the teams and games of a sports league. A

team has a number of players, not all of whom participate in each game.

It is desired to keep track of the players participating in each game for each team, the positions

they played in that game, and the result of the game.

Design an UML diagram for this application, stating any assumptions you make. Choose your

favorite sport (soccer, football, baseball ...).

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HW #1 #1. Design an 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 U.S. STATE’s Name (e.g., ‘Illinois’, ‘Texas’, ‘New York’) and include the Region of the state (whose domain in {‘Northeast’, ‘Midwest’, ‘Southeast’, ‘Southwest’, ‘West’}). 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’, ‘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 also 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 app ...
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