Map the following ER diagram into relational schema showing foreign keys and primary keys. C1 is partial key (discriminator) in Entity_3

Q: Given the following EER diagram, write down the corresponding relations using the method taught in…

A: The answer is

Q: Consider the following relational schemas: Formulate the Relational Algebra statements for the…

A: Note : As per guidelines of the company, we are authorized to answer 3 sub parts of a question when…

Q: Map the following ER diagram into relational schema showing foreign keys and primary keys. Cl is…

A: Relationship R3 ans R2 are identifying relationship and entity E3 is weak entity.  Thus it will…

Q: What is the difference between the implementation of 1:M unary relationship and M: N unary…

A: GIVEN: What is the difference between the implementation of 1:M unary relationship and M: N unary…

Q: Enrollment and Students. Courses cid ename Al Calculus Location LI A2 Algebra L2 A5 English 1.3…

A: As per the answering guidelines solving the first 3 sub question completely. 1) Here selection…

Q: products * productCode productlines orderdetails * productLine textDescription htmlDescription image…

A: Since you have not provided the data present in the table, I am providing the query based on certain…

Q: Describe three circumstances in which a substitute key for a relation's primary key should be…

A: Conditions for recommending a substitute key Three factors indicate that a surrogate key should be…

Q: Describe three circumstances in which a substitute key for a relation's primary key should be…

A: The question has been answered in step2

Q: Normalize the 1NF relation to 3NF showing the resulting 2NF and 3NF relations. Show your work in…

A: Given Relation is, R(A,B,C,D,E,F,G,H,I,J,K,L) Key attributes are A, B, C The functional dependencies…

Q: This question is based on the following relation and sample data, where Employee Social Security…

A: Actually, database is a used to stored the data.

Q: In the case of a relational model, what would you call characteristics generally, and how would you…

A: The relational model for database management is a method for logically representing and managing…

Q: The type of algorithm in which decomposition of relation schema is constructed from other specific…

A: Certain algorithms are used to create relational decomposition from a set of relationships in…

Q: Description of three circumstances in which it is appropriate to generate a replacement key for the…

A: In computer code engineering, incremental Development might be a process that stresses the value of…

Q: There are four options for mapping specialization/generalization from an EER to a relational schema.…

A: According to the information given:- We have to follow EER model and apply four option to map…

Q: Expertise Degree Name PersNr Doctor Treats Worker is a M Name Nurse Patient PatientNr Skills Illness…

A: is_a Relationship -  One entity type might be a subtype of another--very similar to subclasses in OO…

Q: Map the following ER-Diagram into schema Diagram. Note: Must state the PK/FK example R3(A7/Pk, A5,…

A: The relationship between 1 and 2 is 1:M. So we need to include primary key of relation 1 as foreign…

Q: Convert the following ERD to relation schemas. EXPLAIN your answer. Dept Course number Name Name Id…

A: The Answer is

Q: How does the "third normal form" improve upon the "second normal form" in relational data modeling?

A: Database normalisation involves organising the fields and tables in a database to minimise…

Q: Explain three scenarios in which a surrogate key for a relation's primary key should be generated.

A: Introduction Explain three scenarios in which a surrogate key for a relation's primary key should be…

Q: cid name name city Customers Manufacturers make place Contain Products Orders pid description oid…

A: INTRODUCTION:               To create a table from the ER Diagram we have to learn about the ER…

Q: Consider the following database and its schema and write relational algebra expression to retrieve:…

A: The relational algebra expression to retrieve the ids of suppliers who supply red chains and their…

Q: What are three criteria that indicate that a surrogate key for a relation's main key should be…

A: Surrogate key: It is a key that does not have any contextual meaning but is used to identify the…

Q: Question: Do a Left Outer Join of relations D and C over their common attributes. D being the…

A: Below i have given query:

Q: just answer true/false  a]Disjointness means that every entity of a supertype must be an entity in…

A: As per bartleby guidelines we need to answer only the first 3 subparts in a question. a]Disjointness…

Q: OE-> E QUESTION 8 What is the type of relationship between Person and Club in this diagram? Person…

A: Note: Since the Question is multiple hence we are advised to do only one question. Question 8.…

Q: Apply the ER-to-Relational Mapping Algorithm to get the relational model (database schema) from the…

A: For relationship between Dependent and employee is 1:N with the dependent being weak entity. So we…

Q: Discuss each of the following concepts in the context of the relational data model: (a) relation (b)…

A: Relational Data Model The logical data structures—the data tables, views, and indexes—are different…

Q: Describe three circumstances in which a substitute key for a relation's primary key should be…

A: Conditions for recommending a substitute key Three factors indicate that a surrogate key should be…

Q: Lab 3: Normalization Assignment: Problem #11 from Chapter #6. (Be sure to note that this is PROBLEM…

A: The relation schema for the table structure is given below, CHARTER (CHAR_TRIP, CHAR_DATE,…

Q: Consider the following schema: Suppliers (sid, sname, city) Parts (pid, pname, color) Catalog (sid,…

A: I have given queries for 1st 3 questions. because there are multiple questions here so we can answer…

Q: Show all the steps as you perform normalization for each problem up to 3NF. State your final…

A: From looking at table values since there is transitive dependency as Emp_no determines Lcode and…

Q: Give an SQL schema definition for the employee database of Figure 3.19.Choose an appropriate domain…

A: Given: Give an SQL schema definition for the employee database of Figure 3.19.Choose an appropriate…

Q: Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Location Al…

A: Write the following query in Relational Algebra.a) Find the sids of students who have enrolled in…

Q: Identify FIVE properties that a relation must have in the relational model.

A: A relational database is a type of database that organizes data into tables with rows and columns,…

Q: Convert the following ERD into relational schema. It should include the relation names, attribute…

A: Convert strong entities into relational tables. Convert weak entities into relational tables.…

Q: Describe three circumstances in which a substitute key for a relation's primary key should be…

A: The answer for the above question is given in the below step.