Consider a database for a bank, including mation about customers and their accounts. Infor- mation about a customer includes their name, ad- dress, phone, and Social Security number. Accounts have numbers, types (e.g., savings, checking) and balances. Also record the customer(s) who own an account.

Consider a database for a bank, including mation about customers and their accounts. Infor- mation about a customer includes their name, ad- dress, phone, and Social Security number. Accounts have numbers, types (e.g., savings, checking) and balances. Also record the customer(s) who own an account.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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3- Consider a database for a university system that needs to store information about students,courses, and instructors. Each student can enroll in multiple courses, and each course can havemultiple instructors. Normalize the following schema to Third Normal Form (3NF), and showyour steps in between (1NF, 2NF).Students (StudentID, FirstName, LastName, CourseID, InstructorID)Courses (CourseID, CourseName, InstructorID)Instructors (InstructorID, FirstName, LastName)4- To keep track of office furniture, computers, printers, and other office equipment, the FOUNDITCompany uses the table structure shown below.a. Given that information, write the relational schema and draw the dependency diagram.Make sure that you label the transitive and/or partial dependencies.b. Write the relational schema and create a set of dependency diagrams that meet 3NFrequirements. Rename attributes to meet the naming conventions, and create newentities and attributes as necessary.
Q. 1 Consider a university database for the scheduling of classrooms for final exams. This database could be modeled as the single entity set exam, with attributes course-name, section-number, room-number, and time. Alternatively, one or more additional entity sets could be defined, along with relationship sets to replace some of the attributes of the exam entity set, as1. course with attributes name, department, and c-number2. section with attributes s-number and enrollment, and dependent as a weak entity set on course3. room with attributes r-number, capacity, and buildingShow an E-R diagram illustrating the use of all three additional entity sets Listed and also specify the primary keys all
Consider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows: o The mail order company has employees, each identified by a unique employee number, first and last name, and Zip Code. o Each customer of the company is identified by a unique customer num, first and last name, and Zip Code. o Each part is identified by a unique part number, a part name, price, and quantity. o Each order placed by a customer is taken by an employee and is given a unique order number. Each order contains specified quantities of one or more parts. Each order has a date of receipt as well as an expected ship date. The actual ship date is also recorded. Design an Entity-Relationship diagram for the above environment. Please indicate Cardinality Constraints and Participation Constraints
Consider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows: o The mail order company has employees, each identified by a unique employee number, first and last name, and Zip Code. o Each customer of the company is identified by a unique customer num, first and last name, and Zip Code. o Each part is identified by a unique part number, a part name, price, and quantity. o Each order placed by a customer is taken by an employee and is given a unique order number. Each order contains specified quantities of one or more parts. Each order has a date of receipt as well as an expected ship date. The actual ship date is also recorded. Design an Entity-Relationship diagram for the above environment.
Consider a straightforward database that contains data about a student's grades. Provide a SQL query that will return a list of the honour roll students (the top 10%), ordered by their grade point average, and design how this database may appear.
Consider, for instance, the database used by an airline, which implements snapshot isolation as part of its database management system. For instance, the airline could decide to go ahead and accept a nonserializable execution in order to get more favourable outcomes in the long term.
Consider a database that includes the entity sets student, course, and sectionfrom the university schema and that additionally records the marks that studentsreceive in different exams of different sections. Construct an alternative E-R diagram that uses only a binary relationship between student and section. Make sure that only one relationship exists between a particular student and section pair, yet you can represent the marks that a student gets in different exams.
The objective is to create a system that allows you to completely manage the functions of thecompany through an optimal design of the data model, to be adapted to a system connected to aSQL database. StatementThe pharmacy chain “Recetas Rayos X” needs a system to manage information about its operations, such as the purchase, sale and administration of medications, other patients and who prescribed them.a medicine. The information that must be stored is the following:1. Patients are identified by the RUT and the name, surname, date of birth, email,address, several telephone numbers and pension system.2. There are various health provisions, both social and private, and they are correctly codified.3. Doctors are identified by the RUT. For each doctor you have to store the first name, last name,date of birth, specialties and years of practice.4. There are various specialties which are adequately codified.5. Each pharmaceutical company is identified by a code, the name and a telephone…
The objective is to create a system that allows you to completely manage the functions of thecompany through an optimal design of the data model, to be adapted to a system connected to aSQL database. StatementThe pharmacy chain “Recetas Rayos X” needs a system to manage information about its operations, such as the purchase, sale and administration of medications, other patients and who prescribed them.a medicine. The information that must be stored is the following:1. Patients are identified by the RUT and the name, surname, date of birth, email,address, several telephone numbers and pension system.2. There are various health provisions, both social and private, and they are correctly codified.3. Doctors are identified by the RUT. For each doctor you have to store the first name, last name,date of birth, specialties and years of practice.4. There are various specialties which are adequately codified.5. Each pharmaceutical company is identified by a code, the name and a telephone…
Suppose we have a relational database with five tables.table key AttributesS(sid, A) SidT(tid, B) TidU(uid, C) UidR(sid, tid, D) sid, tidQ(tid, uid, E) tid, uidHere R implements a many-to-many relationship between the entities implemented with tables S and T, and Q implements a many-to-many relationship between the entities implemented with tables T and U.D. Suppose you replaced SELECT with SELECT DISTINCT in your queries from parts (a) and Could one of these modified queries return more records than the other? If so, which one? Justify your answer. E. Consider again your query from part (a). If pair sid, uid is returned by this query then there must exist at least one “path” that goes from from table S to table T (via relation R) and then from table T to table U (via relation Q). Note that there can be many such paths for a given pair sid, uid. Write an SQL query that returns records of the form tid, total where…
Consider a database table that includes a salary attribute. Suppose the three queries avg, count, and max (in that order) are made on the salary attribute, all conditioned on the same predicate involving other attributes. That is, a specific subset of records is selected and the three queries are performed on that subset. Suppose that the first two queries are answered and the third query is denied. Is any information leaked?
A database of application of wholesaler can be modelled by means of the relations price, in_stock and supplies. Price is a relation over products1…30, which models the association between prices and stock items. In_stock is a relation over productsN, which models the association between stock items and the current number in stock of product. Supplies is a relation over suppliersproducts which models the relation between a supplier and the product that is delivered by that supplier. If the current value of these relations are following:price = {(nut, 5), (bolt, 13), (screw, 3), (board, 25), (fastener, 23)}, in_stock = {(nut, 700), (bolt, 2200), (screw, 55), (board, 0), (fastener, 600)}, supplies = {(Thomas, nut), (Thomas, bolt), (Wilks, bolt), (Wilks, screw), (Wilks, board), (Wilks, fastener), (Rogers, board), (Rogers, fastener)}, then what is the value of the following expressions? i. {nut, bolt} priceii. dom(price 1…15).iii. rng(price 1…10).iv. dom(supplies; (in_stock {0})). v.…