1) True or False - The foreign keys in a table are linked to the primary keys in another tables
2_ When we convert this ER to relations, which relation will represents the check entity:
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Check( account_number,check_number, check_date ,recipient,amount,memo) |
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Check( check_number, check_date ,recipient,amount,memo) |
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Check( check_date ,recipient,amount,memo) |
|
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Check( account_number, check_date |
3)
When we convert this ER to relation, we will have:
hint: address is multi-valued attribute
Question 4 options:
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customer(cust_id,name) address(cust_id,street,city,state,zipcode) |
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customer(cust_id,name, street,city,state,zipcode) |
|
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customer(cust_id,name) |
|
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address(cust_id,street,city,state,zipcode) |
Homework Answers
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1) True or False - The foreign keys in a table are
linked to the primary...
[1] [30 points] Consider the relation R City, Street, Zip Code), where a tuple (c, s,...
[1] [30 points] Consider the relation R City, Street, Zip Code), where a tuple (c, s, z) is in R only if city c has a building with street s, and z is the zipcode for that address in that city. It is assumed that the nontrivial functional dependencies are: Street → Zip Code ZipCode → City City, [a] [b] [C] [d] [e] Determine all possible keys for R. Indicate all possible BCNF and 3NF violations. Decompose R as necessary...
Please convert figure 9.9 in p305 into relational schemas. In the table, the primary key and...
Please convert figure 9.9 in p305 into relational
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In the table, the primary key and foreign keys (arrows)
must be identified.
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• Foreign Keys (using dotted underline)
• Referential Integrity
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The primary keys are underlined. The foreign keys are denoted by asterisks (*). Description of the...
The primary keys are underlined.
The foreign keys are denoted by asterisks (*).
Description of the schema:
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library. The attributes contain personal and contact
information.
• author — keeps track of personal information about authors.
• publisher — keeps track of the publisher information. To keep it
simple, most of the attributes have been truncated in the sample
database. 1 trivial dependencies are things like X→X or...
c) Write an ER Diagram for the following Library database. Identify all the Entities, Relationships and Attributes. Underline the primary keys and mark the different constraints. You can add an I att...
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I would like help with this question and please be clear and thank you for the...
I would like help with this question and please be clear and
thank you for the help.
Produce a relational schema diagram that corresponds to the following ER diagram for a Vacation Property Rentals database. Your relational schema diagram should include primary & foreign keys. Upload your relational schema diagram as a PDF document. Don't forget that the relation schemas for "Beach Property" and "Mountain Property" should each have primary keys. FYI: "d" in this notation denotes a subclass. Figure...
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[1] [30 points] Consider the relation R City, Street, Zip Code), where a tuple (c, s, z) is in R only if city c has a building with street s, and z is the zipcode for that address in that city. It is assumed that the nontrivial functional dependencies are: Street → Zip Code ZipCode → City City, [a] [b] [C] [d] [e] Determine all possible keys for R. Indicate all possible BCNF and 3NF violations. Decompose R as necessary...
Please convert figure 9.9 in p305 into relational
schemas.
In the table, the primary key and foreign keys (arrows)
must be identified.
Engin size CAR Vin Price VEHICLE d TRUCK Tonnage Model N Date SUV No seats SALE SALESPERSON CUSTOMER Address City Street Sid Name Ssn State Name Figure 9.9 EER diagram for a car dealer
Database: Convert E-R diagrams to relational schema and show
• Primary Keys (using underline)
• Foreign Keys (using dotted underline)
• Referential Integrity
Convert the E-R diagrams to relational schema and show: Primary Keys (using underline) Foreign Keys (using dotted underline) . Referential Integrity Your schema should look similar to the example below. CUSTOMER CustName ORDER PROJECT Foect Title EMPLOYEE PROJECT assigecl to Tite BBli EMPLOYEE PROJECT 0 ProectTitle 4 student admitdate D,C gradstudent advisor major mimor class person name...
Given the following relational database schema (primary keys are bold and underlined). Answer questions 2.1 to 2.4 Orders(orderld, customerld, dateOrdered, dateRequired, status) Customer(customerld, customerLastName, customerStreet, customerCity, customerState, customer Lip OrderDetails(orderld.productld, quantity, lineNumber, amount) Products(productld, name, description, quantity, unitPrice) Account(accountNumber, customerld, dateOpened, creditCard, mailingStreet, mailingCity, mailingState, mailingZip) 2.1 (2 Points) List all possible foreign keys. For each foreign key list both the referencing and referenced relations. 2.2 (2 Points) Devise a reasonable database instance by filling the tables with data of...
Question 1: Please transform the following E-R diagram to relations (40 points) CID Name Street Customer Refers State City City Address Address State Zip Code Street Holds Zip Code Merchant Card Type AccountID Card Account Has Exp Date Charge Date Charge Time Card Type = "C Debit Card Credit Card Has Charges Current Balance Bank No. Amount
The primary keys are underlined.
The foreign keys are denoted by asterisks (*).
Description of the schema:
• person — keeps track of the people who borrow books from the
library. The attributes contain personal and contact
information.
• author — keeps track of personal information about authors.
• publisher — keeps track of the publisher information. To keep it
simple, most of the attributes have been truncated in the sample
database. 1 trivial dependencies are things like X→X or...
c) Write an ER Diagram for the following Library database. Identify all the Entities, Relationships and Attributes. Underline the primary keys and mark the different constraints. You can add an I attribute as a primary key for an entity to make t unique if necessary. Library has a number of branches in the city, each branch having a name, address and librarian. Books have title, authors and publisher. A book can have multiple authors but a single publisher. Note that same...
I would like help with this question and please be clear and
thank you for the help.
Produce a relational schema diagram that corresponds to the following ER diagram for a Vacation Property Rentals database. Your relational schema diagram should include primary & foreign keys. Upload your relational schema diagram as a PDF document. Don't forget that the relation schemas for "Beach Property" and "Mountain Property" should each have primary keys. FYI: "d" in this notation denotes a subclass. Figure...
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