Given the following ERD for a Project Management Application-ManagerigLastnameFirst_nameSkal nameManagetSkilsSkill payManagesHas木木ProjectWorks On本EmployeeEmp ldProject_nameProject costEmp frst_nameEmp start_date2.1) Identify (write down) all relationships and their cardinality and write the corresponding businessrules.2.2) Show the relational schema for the database. Make sure to clearly indicate primary keys andforeign keys (be careful on this part, FK's need to Support the Cardinality you listed in Q2.1).木

Answered: Image /qna-images/answer/cffde84d-79f2-4c09-94a3-cc369ab1cc71.jpg

Answered: 2.1) Identify (write down) all…

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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Using the invoice table stucture do the following:a.Write the relational schema ,draw its dependency diagram,and identy all dependencies,including all partial and transitive dependencies.You can assume that the table does not contain repeating groups and that an invoice number references more than one product.b.Remove all partial dependencies,write the relational schema,and draw the new dependency diagrams.Identify the normal forms for each table structure you created.c.Remove all transitive dependencies,write the relational schema,and draw the new dependency diagrams.Also identify the normal forms for each table structure you created.d.Draw the Crow's Foot ERD.
The database used for this question is a very simple one with the following schema: (Primary keys are bold, foreign keys are underlined) CUSTOMER (CustID, FirstName, LastName, City, Phone, Email) INVOICE (InvoiceNumber, CustID, Date) INVOICE_ITEM(InvoiceNumber, ItemNumber, Quantity) ITEM (ItemNumber, ItemName, UnitPrice) When a customer makes a purchase, an invoice is created. The invoice may be for many items. For example, in a single purchase, a customer might buy 10 Back Scratchers, 4 Hair Removers and a Dog Lead. 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. as you prefer. You do not need to try to make efficient queries – just correct ones. Where you use a join, always show the join condition. List the dates on which Homer Griffin made purchases. List the first and last names of customers who have bought “Back Scratcher” or “Hair Remover” List the first…
Please draw an relational ERD with multiplicities and all the attributes based on following description: ( Please identify the primary key in each entity.) An Adult Education Department runs various courses during the daytime and evenings, and at different times of the year. For example, ‘Spanish level 1’ is offered on Monday mornings, Monday evenings or Wednesday evenings, and runs over 25 weeks from October to March. On the other hand, ‘Introduction to Digging Up Your Ancestors’ only runs for 8 weeks, but is offered on Tuesday or Wednesday evenings from October to December, January to March, and April to June, with an optional field week in August. There is always a maximum number of places for each course offering, which is dependent on the individual teacher. For example, ‘Spanish level 1’ on Monday evenings may be limited to 20 places, but on Wednesday evenings the limit may be 25. Each course offering is only taken by one teacher, however teacher may take…
Consider the follow relations’ schemas to answer the following questions: Student (sid, name, level, address) Book(bid, title, author) BorrowedBook(sid, bid, date) 1) Assume that, there are 10,000 Student records stored on 1,000 pages/blocks, 50,000 Book records stored on 5,000 pages, 300,000 BorrowedBook records stored on 15,000 pages, and there are 500 different authors. Find out what is the record size for each of the previous relation?, and what is the blocking factor for each relation?
Which one is correct * Consider the following ER diagram illustrating the relationship of customers and banks. DateActCreated BName BankID Cname Bank Account Customer NID Select from among the following candidates for relations, if the above ER is mapped into a relational model. 1-Customer(NID(pk).CName) 2-Account(DateAccCreated(pk).BName,CName) 3-Bank(BanklD(pk),NID.BName) 4-Bank(BankID(pk).BName) 5-Account(BankID(pk), NID (pk),BName, DateAccCreated) O 1,4 and 5 O 1,2 and 4 1,3 and 5 O 1,2 and 3
Convert the preceding ER diagram into a relational DB schema. (I want you to do this yourself, not using automated tools. You can use ERDPlus to construct the relational schema yourself, or you can do it yourself on paper and take a picture.) Indicate all primary keys correctly. Be sure to include arrows for foreign key relationships. Also make sure that all attributes in a single relation have different names. ER Diagram (DeviceName) Brand Model TicketNum DEVICE REPAIR TICKET Exhibits Nickname Assigned To PROBLEM TechID REPAIR TECHNICIAN Expert At Description Name PhoneExt Level
Create tables based on the below given relational model. Define your own data type to the attributes and apply your own constraints to the attributes Identify the primary, Hospital tables: patients (patient-id, name, insurance, date-admitted, date-checked-out) doctors (doctor-id, name, specialization) test (testid, testname, date, time, result)
I need help with the following. Use the schema as reference. So can someone answer this using relational algebra?
I'm having trouble with this question with my data modeling class. " Scenario: Jonny is appointed as an intern position, which might lead to a junior database architect role in TechTrend Corporation (TTC). Jonny is assigned to redesign two legacy tables related to "Suppliers," to be normalization compliant. The following business rules are provided. Business Rules: 1. Suppliers can be local or national, thus can have multiple locations. 2. Any location can supply items to TechTrend. 3. Any location manager can have a separate pricing deal with TechTrend, based on production process specific to that location and localization efficiency. 4. Each location has a contact person assigned to TechTrend. 5. Traditionally, TechTrend dealt with a singular location, at the most two. With rapid growth in business, the TTC officials are finding better leverage possibilities to negotiate beneficial terms with suppliers in multiple locations. 6. The DB administrator has specifically requested Johnny…
4) List all candidate keys of the books relation. 5) List all of the candidate keys of the publishes relation. 6) List all of the superkeys of the publishes relation. 7) Are there any attributes in considered logically non-atomic? Briefly explain why or why not. 8) Assuming tuple (4,83,200,1990) into the publishes table failed. Why did this happen? What database principle was violated?
Final Exam 15 - Consider the following Entitiy Relationship diagram. Which of the following relation will not hold if the above ER diagram is mapped into a relational model? I) Product (Productld, Desciption) II) Requests (Productld, Orderld) II) Order (Orderld, Productid, Date) IV) Order (Orderld, Date) ProductID Description Orderld Date M N Product Requests Order a) O IV II II Leave blank Close
Following tables support the database of a shopping store. The schema contains four tables i.e.Customer, Product, Order and Order Product. Table details including attributes, primary keys(underline) and foreign keys (bold) are also shown below:CUSTOMER(CustID, CustName, CustEmail, CustPhone, CustCNIC)PRODUCT(ProdID, ProdName, ProdPrice)ORDER(OrderID, OrderDate, OrderPrice, CustID)ORDER_PRODUCT(OPID, ProdID, OrderID)

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