Answered: What are the challenges associated with…

Engineering

Computer Science

What are the challenges associated with "diamond dependency" problems?

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

See similar textbooks

Related questions

Q: QUESTION 6 There will be three tables after converting the following conceptual diagram into the…

A: 6) Answer :-- False It will converted into two table table A with two fields named field1 and…

Q: dependency diagram and explain its purpose

A: A dependency diagram and its purpose

Q: A weak entity set may always be trans formed into a strong entity set by including the primary-key…

A: The Answer is given below step.

Q: Explain the concept of dependency injection in software development and its role in achieving loose…

A: Dependency Injection (DI) is a fundamental concept in software development, particularly in…

Q: Q.No.1.a. Draw ER- notation for the given elements of ER-Model. Entities Strong Entity Weak Entity…

A: Note: The solutions of the first three subparts of question 1 are shown below. Please repost the…

Q: What are dependency diagrams, and what are their purposes?

A: What are dependency diagram? Similar to a typical architectural diagram, a dependency diagram shows…

Q: Can someone do a 3NF DEPENDENCY DIAGRAM? and explain it I am trying to understand it

A: Third normal form: For a relation to be in the 3NF, it should maintain the properties of the second…

Q: Instead of adopting the snowflake model, you may write forth the benefits and drawbacks of using the…

A: Make a list of the benefits and drawbacks of the star schema vs the snowflake model. Which one has…

Q: Alce kon William Smithfield David H. Senior Ditatase LAgw 33.7 $ 450.45 $ 35.75 $ 96.75 106 126 102…

A: below I have answered.

Q: What precisely do you mean when you say that transitive reliance is a kind of dependence that is…

A: What is system in computer science: In computer science, a system refers to a collection of…

Q: Each weak entity collection may be fortified by adding more relevant attributes. The question then…

A: Introduction: Entity sets and weak entity sets are fundamental concepts in database design. Weak…

Q: What exactly is a dependency diagram, as well as the purpose it serves?

A: A dependency diagram is the graphical display of all tasks in a workflow that are necessary to…

Q: cy diagrams, and

A: Solution - In the given question, we have to tell what are dependency diagrams, and what are their…

Q: What are dependency diagrams, and what are their purposes?

A: Answer of this question is as follows:

Q: What are dependency diagrams, and what are their purposes?

A: A dependency diagram shows the key elements or functional units of the design as well as how they…

Q: What are dependency diagrams, and what are their purposes?

A: A dependency diagram displays the dependencies for the entire project or a specific project resource…

Q: The readers and writers dilemma may be posed in a number of different ways, depending on the order…

A: Definition: A synchronisation issue known as the Readers-Writers dilemma arises when some processes…

Q: in a database system the functional dependency preservation within relations is critically…

A: If in a database system the functional dependency preservation within relations is critically…

Q: So, what exactly is a dependency diagram and how does it work?

A: The answer is given below step.

Q: Explain the concept of functional dependency and its role in normalization.

A: Database Management:Database Management involves the organization, storage, retrieval, and…

Q: Suppose that we are designing a DB for a car dealership, parts and repairs are conducted by the…

A: Entity Relationship Diagram Data model according to the business rules given Connectivity in the…

Q: What are the two requirements that an entity must have in order to be classified as a weak entity?…

A: We have to discuss What are the two requirements that an entity must have in order to be classified…

Q: C a1 b1 с1 d1 e1 a2 b1 c2 d2 e1 a3 b2 с1 d1 e1 a4 b2 c2 d2 e1 a5 b3 c3 d1 e1 Given the above table…

A: functional dependency is used to defined a relationship between primary key ad other attributes. IN…

Q: Define "dependency diagram" and explain its purpose.

A: Here in this question we have asked to define dependency diagram and also explain it's purpose.

Q: Define and discuss the concept of transitive dependency.

A: Asked: Define and discuss the concept of transitive dependency.

Q: Functional Dependencies Identification Identify a set of FDs from the documents in the figure below:…

A: Functional dependencies in the database management system are a set of rules which define the…

Q: How dependent are systems on one another, and what precisely does the word "dependency" signify in…

A: IntroductionIn today's world, systems are increasingly interconnected and interdependent. The idea…

Q: Using your own words differentiate between concerns and constraints?

A: Constraints means a limitation or restriction. Concerns means making someone anxious or worried.

Q: Please TYPE IF POSSIBLE OR WRITE CLEARLY Consider a relation X with six attributes WYSMFE where WS…

A: 1. Primary key for the given relation is (W, S) The FDs S -> YME This is partial functional…

Q: Instead of using the snowflake model, you could write about the advantages and disadvantages of…

A: Snowflaking is a method of normalizing the dimension tables in a STAR schemas.

Q: Structurally-speaking, what weakens a weak entity (ie. why do we even call it 'weak')? b.How would…

Q: Write the short answers for the given question. Answer in 3-5 line maximum. A. Give examples of…

A: A. systems in which it may make sense to use traditional file processing instead of a database…

Q: a.Changes in Inventory Department view of the vendor table will not impact Billing Department view…

A: Given:The Giant Corporation has many departments. The Inventory and Billing departments deal with…

Q: Define the term Transitive dependency?

A: Transitive Dependency: The constraints that occur indirectly between the attributes of the table and…

Q: Q12: what is changing one requirement, while taking into account competing requirements A. Software…

A: /*The whole solution will be only for Question no. 12*/ When changing one requirement while…

Concept explainers

Normalization

Normalization is the process of eliminating redundancy in a database by organizing the data into several smaller tables. The large tables are normalized (converted) into smaller tables by using normalization rules, so that a database administrator can easily handle them. It also eliminates insertion, deletion, and update anomalies.

Question

What are the challenges associated with "diamond dependency" problems?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Question Explain

VIEW

Step 2: Answer

VIEW

Solution

VIEW

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

In all cases, a weak entity set may be converted into a strong entity set by adding the primary-key attributes of its identifying entity set to its attributes. Provide an example of the kind of redundancy that will result as a result of our decisions.
Describe the pros and cons of using the star schema rather than the snowflake approach. Which one is more out of the ordinary?
What are the two requirements that an entity must meet in order to be classified as a weak entity?Give an example of a weak or susceptible entity to illustrate your point.
The readers and writers dilemma may be posed in many different ways, depending on which set of processes is being considered. Explain three alternative permutations of the issue, each of which may favor one set of procedures over another. For each iteration, detail what occurs when a reader or writer is ready to access the database, and when a procedure is complete.
A weak entity set may always be transformed into a strong entity set by including the primary-key attributes of the identifying entity set in its attributes. Explain what kind of redundancy will arise as a consequence of our decision.
Develop a logical data model based on the following requirements:• Refinement of the conceptual model - including a refined Enhanced Entity-Relationship (EER) diagram.• Derivation of relations from the refined conceptual model.• Validation of logical model using normalization to BCNF.• Validation of logical model against corresponding user transactions.• Definition of integrity constraints including:- Primary key constraints.- Referential Integrity (foreign key) constraints.- Entity integrity (NULL and default value) constraints.- Alternate key constraints.- General constraints if any. Entities Airplane Model Technician Expertise Traffic Controller Medical Examination Union Test Testing Event Relationships Airplane is of Model (1:M) Technician has Expertise in Model (M:M) Traffic Controller undergoes Medical Examination (1:1) Employee belongs to Union (1:1) Airplane is Tested using Test (M:M) Testing Event records Airplane, Technician, and Test (M:M:M) Attributes Airplane…
What are dependency diagrams, and what are their purposes?
1. PART Evaluation and optimization: A schema of the ski shop information system is given: Customer (cid, name, surname, address, telephone); Employee (eid, name, surname, address, telephone); Purchase (pid, sid, cid, eid, date); Skiis (sid, brand, model, length, hardness) Additional information is given: |Customer] =150 pages, 40 records/page | Employee | = 2 pages, 40 records/page | Purchase | = 2000 pages, 100 records/page |Skiis | = 250 pages, 30 records/page Buffer can store up to 2500 pages. Let's assume that the following indices are now set on the schema from the previous task: Level 2 B+ index on the attribute Purchase.date Hash index on the attribute Skiis.sid - Our DBMS has the following algorithms to perform the join: Hash join - Index nested loops join Sort-merge join Translate the following SQL query into relational algebra and find the plan that reads the fewest pages or blocks: SELECT Skiis.model, Skiis.length FROM Skiis JOIN Purchase ON (Skiis.sid = Purchase.sid) WHERE…
4. (a) Why is normalization important in database design? Consider the universal relation R = {A, B, C, D, E, F, G, H, I, J} and the set of functional dependencies F = { AB → C, A → DE, B → F, F → GH, D → IJ }.What is the key for R? Decompose R into 2NF (Second Normal Form) and then 3NF (Third Normal Form) relations. (b) Consider a relation schema R = (X, Y, Z) on which the following functional dependencies hold: { XY → Z, Z → X }. Show that the schema R is not in BCNF (Boyce-Codd Normal Form) but it is in 3NF (Third Normal Form).