weak entities

Q: several interviews with the users, you have come up with the following data requirements an business…

A:

Q: Read the following business rules carefully and use common sense when necessary to come up with a…

A: Our model accounts for various core entities within the healthcare clinic, including patients,…

Q: Let us consider the following relational database. Students(stuID, lastName, firstName, major, gpa)…

A: The SQL INSERT INTO statement is used to add new rows of data to a table in the database.while…

Q: Please written by computer source There are 2 parts to this assignment Unit 6 - Part 1--Prepare a…

A: Some important terms: Business/Organization: Refers to the entity for which the database is being…

Q: When a database is “normalized” it is restructured (according to a series of normal-forms, which we…

A: Normalized diagram with explanation.

Q: 1. Total participation is where each entity participates in at least one relationship in the…

A: 1- True, Each entity in the entity set is involved in at least one relationship in a relationship…

Q: 2. A table is in 2NF if it is in 1NF and it includes no partial dependencies: a)True b) False 3) A…

A: 2. Because it contradicts the definition of a table in second Nomal form, it is untrue. When a table…

Q: Given the following relation R and its functional dependencies: R(workerNumber, repairNumber,…

A: Given information: - A relational schema R is: R(workerNumber, repairNumber, workerName,…

Q: For the battleships database schema defined above in question 4, write the following as tuple-based…

A: Hey there, I am writing the required solution based on the above given question. Please do find the…

Q: 1) What results will be produced by execution of following query?  SELECT c.CustName FROM Customer c…

A: SQL queries

Q: a) For each PC, double the amount of RAM and add 100 gigabytes to the amount of the hard disk. Note…

A: SQL>UPDATE PC SET price=2*price,hd=100+hd; in above sql query we get in all pc double the amount…

Q: QUESTION 2 Consider the database schema below:    Company (CompnayID: integer, CompnayName:…

A: Definition of Candidate Key in DBMS: Candidate keys are super keys that don't have any redundant…

Q: Exercise 1-2 A small library keeps a roster of who will be at the desk each day. They have a…

A: Answer :-    This database can only ever be as good as the parameters that are entered, and some…

Q: Each BANK has a unique Code, as well as a Name and Address. Each BANK is related to one or more…

A: We are provided with a mini-world bank and we need to find the cardinality ratio of the given for…

Q: Q) Create an entity-relationship diagram (ERD) using min-max notation based on the following data…

A: In this question, it is asked to provide the ER - diagram  for this system of the University and…

Q: Specify

A: Here are the SQL queries as asked:   1. List the department managers who are controlling more than 2…

Q: Databases and Database Users exercise: Figure 1.2 is on image Consider Figure 1.2. a.) If the name…

A: a. Identifying the column in the database: The below column needs to be updated when the name of the…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: There is only one error in the above code and that is the ALTER TABLE command on the address table.…

Q: 5. Database design often involves decisions about the storage of attributes. For example a Telephone…

A: Database design is a crucial aspect of information management, software development, and data-driven…

Q: Flight-Distance Database FLIGHT (Flight#, Origin, Destination, Mileage) FLIGHT Flight# DL507 DL123…

A: For a table to be in 3rd NF : It should be in 2nd NF and should not have any transitive dependency…

Q: Write the following queries in SQL on the relational database schema for COMPANY database given in…

A: As per company rules we are only supposed to answer first question in case of multiple questions.…

Q: he following database schema is used in Questions 1-5. Product(maker, model, type) Printer(model,…

A: Hi. I am writing a tuple based constraint for the printer schema. I don't believe that this [Note:…

Q: KimTay Pet Supplies database design (see Figure 2-1) to support the following requirements. A…

A: the solution is an given below :

Q: Instructions: Create a complete ERD in Crow's Foot notation that can be implemented in the…

A: a) Crowfoot Notation:

Q: The database stores information about houses, each with a house ID, address, and zip code. 2. The…

A: Given: 1. The database stores information about houses, each with a house ID, address, and zip code.…

Q: (a) Use STUDENT and LECTURER tables shown below to answer questions (i) and (ii). Table name:…

A: As per our rules, we can answer only the first sub-part in a multi-part question. Please submit the…

Q: The following exercises are based on the BITS database user views as designed in Your Turn 6-1 in…

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Q: Consider the following database schema and specify the following queries or views in SQL.…

A: a)select SSN,name from EMPLOYEE where SSN in(select SSN from WORKON group by SSN having…

Q: For developing our queries, we will be using the following relational schema: Student(SID, name,…

A: Q1.  Here we need to join relation Course and Offering and use selection operator to select only…

Q: An entity whose presence depends on the presence of another entity in the database is a weak entity.…

A: A weak entity in database design refers to an entity type that does not have a primary key or whose…

Q: Database course:  Convert the following ER diagram into a relational database schema, be certain to…

A: The relationship between Accident and Car is M:N. Thus we need to create a new table for the…

Q: Question & V Saved Problem 4-7 will use the same database Let a database application be Model…

A: The answer is

Q: Question 6 Inventory Database: Customers(custid, custName, address, phone, credit Limit)…

A: From the given information in the question, to display the customer ID and the number of orders for…

Q: In a train stations database, an employee MUST be a train driver, ticket issuer or train attendant,…

A: An Enhanced Entity-Relationship (EER) diagram is a visual representation of the structure and…

Q: QUESTION 5 Consider the following relations in a University database: Student (SID, SName, Age, GPA)…

A: The SQL statement plays a major role to retrieve the data according to user requirements. The…

Q: a) Referring to the company database, which relations have the same set of attributes for their…

A: *As per the guideline we can only answer 1 question in case of multiple questions* Please find the…

Q: 5.6 LAB - Implement independent entity (Sakila) Implement a new independent entity phone in the…

A: First check whether phone_id column exists in your customer, staff, and store table or not. If…

Q: Explain what normal form the relation is in. b) Apply normalization until the 3rd State reasons…

A: A)  From the given functional dependency, primary key for the given relation is (Title, Author)  The…

Q: Which of the following statements corresponds to the second normal form for an entity - relationship…

A: A relationship must have a key,with simphleks domains for its attributes and all non-key attributes…

Q: DATABASE SYSTEM A relation R is given which is R(A,B,C,D,E). It has the following functional…

A: BC  -> ADE , D -> B primary key is (BC) because: Closure of (BC)+ = {A, B, C, D, E} here, the…

Q: A DreamHome database has following tables. Branch (branchNo, street, city, postcode) Staff…

A: Relational algebra is a formal mathematical framework used in database management systems (DBMS) and…

Q: Client (clientNumber, firstName, lastName, clientCity) Account(accountNumber, #agencyNumber,…

A: For the required query creating the first three tables:   (here, underline cloumn names are the…

Q: 7. In the context of database design, consider the following scenario: There is database table that…

A: Normalization is a cle­ar way to break down tables to cut down repe­ated data and avoid issues like…