Q2. Use the dependency diagram shown below to work the following problems. Initial dependency diagram: ABCDEFG a) Break up the dependency diagram above to create two new dependency diagrams, one in 3NF and one in 2NF.

Q2. Use the dependency diagram shown below to work the following problems. Initial dependency diagram: ABCDEFG a) Break up the dependency diagram above to create two new dependency diagrams, one in 3NF and one in 2NF.

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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Question: Draw a diagram showing the relationships for all the tables. The following tables need to be modified as shown (primary key attributes are bold, foreign key attributes are in italics): CID in Retail and Wholesale are defined as a primary key and a foreign key. CUSTOMER (CID, Name, Address) PHONE (PhoneNumber, Description, CID) RETAIL (CID, Type) WHOLESALE (CID, ContractID) CONTRACT (ContractID, Description) OLDCONTRACT (ContractID, Description) ORDER (OID, OrderDate, CID) PRODUCT (PID, Name, Price) DIVISION (DID, Name, Address) LINEITEM (OID, PID, Quantity, AmountCharged) PRODUCTION (DID, PID, Quantity, Rating) One-to-one Relationship If the foreign key will be the primary key or part of the primary key, choose the Identifying Relationship 1:1 icon. Otherwise, choose the Non-Identifying Relationship 1:1 icon.
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The dependency diagram indicates that authors are paid royalty for each book they write for a publisher.The amount of royalty can vary by author,by book ,and by edition of the book. a.Based on the dependency diagram,create a database whose tables are atleast in 2NF showing the dependency diagram for each table. b.Create a database whose tables are atleast in 3NF,showing the dependency diagram for each table.
Task #1 – Identification of dependencies We learned about two types of functional dependencies, Partial Dependency and Transitive Dependency, and they are critical clues for the identification of tables. In this task, we will practice how to identify the two types of dependencies, so that we can improve the results to new tables. Below is a list of attributes of a dataset. However, the attributes still have some functional dependencies, which means you can create more tables by separating some field(s). Order_ No Product_ No Product_ Description Product_ UnitPrice Customer_No Customer_ Phone Customer_ Address Order_ Date Shipping_ Address Order_ Qty Which partial dependency does this dataset have? Identify the partial dependency using the format in the example below. Example) Partial Dependencies: (ProjectNum ? Proj_Name) (Emp_Num ? Emp_Name, Job_Class) Then, which transitive dependencies does this dataset have? Identify the transitive dependencies…
Consider the following relation named Trip. Trip The functional dependencies are as follows: (TripID, TripName, StartLocation, State, Distance, MaxGrpSize, Type, SeasonNum, Season TripID, SeasonNum → TripID → A. SeasonNum →→ Season C. [TripName, StartLocation, State, Distance, MaxGrpSize, Type The tables that are in third normal form are: [TripName, StartLocation, State, Distance, MaxGrpSize, Type, Season Trip TripID, TripName, StartLocation, State, Distance, MaxGrpSize, Type) Season (Season Num, Season), TripSeason (TripID, SeasonNum) B. Trip (TripID, TripName, StartLocation, State, Distance, MaxGrpSize, Type) Season (SeasonNum, Season) Trip TripID, TripName, StartLocation, State, Distance, MaxGrpSize, Type) Season (TripID, SeasonNum, Season) D. None of the above
Explain the concept of functional dependency in the context of normalization. Provide an example.
Create ERD of a hospital with these requirements "and then" write relation schema (underline primary key and connect foreign key with arrow): (use Chen Notation) 1. Hospital have many department, each department have it's own ID, name, and head of department. 2. Hospital need to collect Patient data included : ID, Name, Sexuality, Age, Address, Health Insurance, Telnum 3, Patient may have data stored about people they can contact, should be more than 1 people they can contact 4. Doctor should have : DocID, Name, Sex, TelNum, Specialty, Years of service, Salary, Qualification 5. 1 doctor can be assigned to only 1 department 6. some doctor may not have their assigned patient 7. patient can be assigned to more than 1 doctor for treatment 8. each treatment shall be stored (date, detail, next appointment) Specification for the diagram: - describe what should be describe and what can be describe inside the diagram - also explain others that can be describe inside the diagram briefly (don't…
DeepClean StaffID ContractNo HoursPerWeek StaffName OfficeNo OfficeLocation 101 C90 16 Anne O25 Ampang 102 C90 24 Rita O25 Ampang 103 C91 28 Mandy O7 Kg Baru 101 C91 16 Anne O7 Kg Baru Draw the dependency diagram and label the primary key(s), partial dependency(s) and transitive dependency. Based on the dependency diagram in Question (a), show the Second Normal Form (2NF) relations. Convert the relations to the Third Normal Form (3NF).
Informally describe the conditions to be met for a relation to be in Second Normal Form. In terms of functional dependency, describe why the following CUSTOMER_PURCHASE relation is not in second normal form. This table describes every instance of an individual Customer purchasing a Product. How would this relation suffer from Update Anomalies? CUSTOMER_PURCHASE (CUSTOMER_ID, PRODUCT_ID, PURCHASE_DATE, PURCHASE_AMT, PRODUCT_DESCRIPTION, CUSTOMER_NAME) Note the relation’s primary key is underlined
Question 2:- The dependency diagram shown indicates that authors are paid royalties for each book that they write for a publisher. The amount of the royalty can vary by author, by book, and by edition of the book. ISBN Book Title Author Num c) Draw the Crow's Foot ERD. LastName Publisher Royalty Edition
The below data is in first normal form. Normalise the data to third normal form, showing all steps with explanations. Dependency diagrams or tabular data are acceptable for the final answer. Primary key: PlayerName, CharacterName Player Player Character Character Character Name DateJoined Name Level Маx Health Bob 2014-12-31 George 50 800 Bob 2014-12-31 Fred 50 1200 Alice 2015-05-09 ZeAlice 21 350 Charles 2016-09-09 HisRoyalHighness 30 470 Delta 2020-02-29 WarriorDelta 50 1205 Delta 2020-02-29 DeltaMage 60 2.
Consider the following schema: Suppliers (sid, sname, city) Parts (pid, pname, color) Catalog (sid, pid, price) Write relational algebra expressions for the following queries: Find the sids of suppliers who supply every part. please don’t send the answer as a picture.