For 1 through 4, state whether the statements are True or False (Do not provide any explanation or comment but only an answer of either True or False) A composite attribute is an attribute that is composed of several attributes. A derived attribute is an attribute whose value is calculated and not permanently stored in adatabase. Every table is a relation. Referential integrity constraint is a rule stating that no primary key column can be optional.

For 1 through 4, state whether the statements are True or False (Do not provide any explanation or comment but only an answer of either True or False) A composite attribute is an attribute that is composed of several attributes. A derived attribute is an attribute whose value is calculated and not permanently stored in adatabase. Every table is a relation. Referential integrity constraint is a rule stating that no primary key column can be optional.

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter1: Overview Of Database Concepts

Section: Chapter Questions

Problem 5HOA: Access path A database table is composed of records and fields hold data. Data is stored in records....

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Access path A database table is composed of records and fields hold data. Data is stored in records. A field is a part of a record and contains a single piece of data for the subject of the record. The access path for finding the list of books is AUTHOR: AuthorID, Lname BOOKAUTHOR: AuthorID, ISBN BOOKS: Pubdate, ISBN
Primary keys and candidate keys may both be assigned to the same attribute.
Instructions: Write your answers by replacing the blue lines. Explain your answers if necessary. REGIONAL LABS CASE QUESTIONS Regional Labs is a company that conducts research and development work on a contract basis for other companies and organizations. Figure 3-32 shows data that Regional Labs collects about projects and the employees assigned to them. This data is stored in a relation (table) named PROJECT: PROJECT (ProjectID, EmployeeName, EmployeeSalary) Assuming that all functional dependencies are apparent in this data, which of the following are true? ProjectID ->EmployeeName _______ ProjectID ->EmployeeSalary _______ EmployeeName -> EmployeeSalary _______ EmployeeSalary -> ProjectID _______ EmployeeSalary -> (ProjectID, EmployeeName) ______ What is the primary key of PROJECT? ________________________________ Are all the non-key attributes (if any) dependent on the primary key?…
Instructions: Write your answers by replacing the blue lines. Explain your answers if necessary. REGIONAL LABS CASE QUESTIONS Regional Labs is a company that conducts research and development work on a contract basis for other companies and organizations. Figure 3-32 shows data that Regional Labs collects about projects and the employees assigned to them. This data is stored in a relation (table) named PROJECT: PROJECT (ProjectID, EmployeeName, EmployeeSalary) Assuming that all functional dependencies are apparent in this data, which of the following are true? ProjectID à EmployeeName _______ ProjectID à EmployeeSalary _______ EmployeeName à EmployeeSalary _______ EmployeeSalary à ProjectID _______ EmployeeSalary à (ProjectID, EmployeeName) ______ What is the primary key of PROJECT? ________________________________ Are all the non-key attributes (if any) dependent on the primary key? ____________________________________________…
Database Schema The schema for the Ch07_FACT database is shown below and should be used to answer the next several problems. Click this image to view it in its own tab. FIGURE P7.56 THE CH07_FACT ERD CHECKOUT PATRON PK Check Num PK Pat ID FK1 Book_Num FK2 Pat_ID Check_Out_Date Check_Due_Date Check_In_Date >0-----H- Pat_FName Pat LName Pat_Type BOOK AUTHOR PK Book_Num PK Au ID Book_Title Book_Year Book_Cost Book_Subject FK1 Pat_ID Au_FName Au_LName Au_BirthYear WRITES PK,FK1 Book Num PK,FK2 Au ID The CIS Department at Tiny College maintains the Free Access to Current Technology (FACT) library of e-books. FACT is a collection of current technology e-books for use by faculty and students. Agreements with the publishers allow patrons to electronically check out a book,
A relation is a function only if any two first values in the pairs are the same. True or False
A relation cannot have: Multi-values attributes Several super-keys Composite attributes Attributes with atomic values
//Need typed version please You are working with a database that stores information about suppliers, parts and projects. The Supply relation records instances of a Supplier supplying a Part for a Project. The schema for the database used in this question is as follows: ( primary keys are shown underlined, foreign keys in bold). SUPPLIER (SNo, SupplierName, City) PART (PNo, PartName, Weight) PROJECT (JobNo, JobName, StartYear, Country) SUPPLY (SNo, PNo, JobNo, Quantity) Provide relational algebra (NOT SQL) queries to find the following information. NOTE: You can use the symbols s, P, etc or the words ‘PROJECT’, ‘RESTRICT’ etc . do not need to try to make efficient queries – just correct ones. Where you use a join, always show the join condition. List the name of any part that was not used on a project that commenced in 2020. List the name of any part that has been supplied to all projects that commenced in 2020.
The properties of the relation object can be used to implement the master-detail functionality which most appropriate for your application. You can delete a master-detail relation by selecting it in the Object Navigator and choosing Navigator => Delete. Discuss the Deletion of Relations in detail.
Design the database as a single relation called Movie. It should contain an ID, Title, Year Released, Genre (e.g., sci-fi, comedy, thriller, etc.), Rating (e.g., G, PG, R, etc.), Format (e.g., VHS, DVD, MP3, etc.), a free-form Comments field, plus the main cast and crew members. Add the following entry plus at least two of your own: Title: Star Trek Year: 2009 Genre: Sci-Fi Rating: PG Format: DVD Director: J. J. Abrams Starring: Chris Pine (Capt. Kirk), Zachary Quinto (Mr. Spock) Zoe Saldana (Uhura), Karl Urban (Bones McCoy) Draw your corrected design as a logical ERD showing attributes and multiplicities (suggest you use IE Notation in Oracle Data Modeler). No need to include physical data types. Modify the sample data from step 1 in a new page to match this design
Can composite keys include composite attributes?
Consider the following ER diagram: storcid address description value Displays Store Memorabilia The above diagram represents information pertaining to stores and the memorabilia that is displayed within the stores. a) Write the SQL statements to create the necessary tables to represent the above diagram, representing as many constraints as possible. Note: you do not need to worry about specifying types for the fields, but you do need to provide suitable foreign key option(s).