student takes ID ID course id sec id name dept name tot_cred semester vear grade section course department course id sec id semester Course id advisor title dept name id dept_name building budget vear time_slot credits building гоот_литber time_slot_id time slot id day start time end_time prereq instructor classroom Course id REereg id building room_number capacity пате dept_name salary teaches ID Course id sec id semester ear Figure 2.9 Schema diagram for the university database.

Q: Create an E-R model for the following scenario. Show entity names, primary keys, attributes for each…

A: We need to create ER diagram for above case studies See below step for diagram.

Q: EER (Enhanced Entity Relationship) diagram: C) Person o person ID : int name: string address :…

A: Introduction and the overview of the query -In this question we have to understand about the given…

Q: Question 6 In order to make it easier to compare the relation scheme diagram to the UML diagram, we…

A: In order to make it easier to compare the relation scheme diagram to the UML diagram, we (check all…

Q: the database relation R(a, b, d, e, f) ribute b and d are dependent only on a; e ly on d; and fonly…

A: The functional dependency possible are a -> b, d d -> e, f Here if we take closure of a, that…

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

A: The answer is

Q: Make the entity-relationship model in Luicdchart for the following case: In the company Tecno1818…

A: Entity Relationship model is used for data modeling to database. It defines the relationship between…

Q: Develop ERD (Entity Relationship Diagram) for one of the following two scenarios. NOTE: No further…

A: Answer: We have drawn the the Entity relation diagram  for the one of the following so we have done…

Q: Develop a diagram that shows the functional dependencies in the SHIPMENT relation

A: To create a functional dependency diagram, functional dependence means that a dependency value from…

Q: Create an E-R model for the following scenario. Show entity names, primary keys, attributes for each…

A: According to the information given:- We have to follow the mentioned scenario in order to make the…

Q: An ID-dependent Weak Entity typically result in a table with a compound primary key with at least…

A: A weak entity in a relational database is one that can't be uniquely identified by just its…

Q: Regards to the diagram below (figure 4.12), answer the following questions using the multiple-choice…

A: The answers for the following question can be derived from the diagram given. How is of_type…

Q: Assume that there is a one-to-one match in the advisor relationship set. What further restrictions…

A: One-to-One Interactions: In DBMS, a relationship between two items may be described as a link, such…

Q: Consider the following E/R diagram with isa relationships, in which every node represents an entity…

A: Here I am explaining this with an example. For this example I filled up the blank entities with some…

Q: Which one is correct When transform the following ER diagram into a relational schema name manager…

A: employee is the relation and the remaining will be the attributes and relationship

Q: Give an illustration of what a Key Attribute is.

A: An key attribute that is part of a key or is the whole key.

Q: A candidate key is a characteristic possessed by a composite primary key. What is your response to…

A: The statement you provided is not accurate. A candidate key and a composite primary key are…

Q: Demonstrate that if a relation contains no property that is functionally determined by all of the…

A: Introduction   Show that if a relation has no attribute that is functionally determined by all the…

Q: Based on the following functional dependencies, for the relation SCHEDULE bring it into a set of…

A: To bring the relation SCHEDULE into a set of 3NF relations, we need to identify the functional…

Q: see of representing relations as a graph or a matrix? What is one way that you might use either a…

A: A graph matrix is a square array that has one row and one column for each node in the graph. Node I…

Q: ER-diagrams are high-level design of the Database. The given ER-diagram describes the Dentist…

A: Weak entities are represented with double rectangular box in the ER Diagram      office, supplier,…

Q: Consider a relation (A, B, C, D, E, F, G) with functional dependencies as given below: ABC D ED-F…

A: Consider the following relation with set of functional dependencies: R (A, B, C, D, E, F, G)…

Q: Assume you have a one-to-one adviser connection. What additional restrictions must the relation…

A: Cardinality restrictions are specified, generalized, and used to simplify design, enhance…

Q: Which one is correct Consider the following ER diagram depicting the relationship of an employee and…

A: To Do: To choose the correct option.

Q: It is possible for the same characteristic to have both a main key and a candidate key.

A: Main key, also known as a primary key, is a specific candidate key that is chosen as the primary…

Q: relations are not physically sorted but both have an index on the attributes that are being merged,…

A: In this question we have to understand the term provided where when both relations are not…

Q: Assume that there is a one-to-one match in the advisor relationship set. What further restrictions…

A: In Databases, an entity in DBMS (Database management System) which refers to the real world thing or…

Q: What are three signs that a surrogate key should be generated for the primary key of a relation…

A: A surrogate key is one that serves no practical or operational purpose. It's "artificial" and made…

Q: Explain the connection between a relation's primary key and the functional dependencies that exist…

A: A primary key is an attribute that identifies a record in a database. It is used to filter data…

Q: Consider relation R in the following E/R diagram. If E1 has 3 entities, E2 has 4 entities, and E3…

A: Given Data : Number of entities in E1 = 3. Number of entities in E2 = 4. Number of entities in E3 =…

Q: Assume that the advisor relationship set is a one-to-one match. To guarantee that the one-to-one…

A: given: One record in one table may be linked to one or more records in another table in a…

Q: Give a Relational Model that corresponds to the Entity-Relationship Diagram in Figure 1. You must…

A: Relational Database schema is given below :

Q: Create an unnormalized relation using student and class entities.

A: Here, we have to create an unnormalized relation using student and class entities.

Q: Following relation schema exists : EMPLOYEE (EMP_ID, EMP_NAME, DEPT, GRADE, SALARY, AGE, ADDRESS).…

A: Answer: Given  EMPLOYEE (EMP_ID, EMP_NAME, DEPT, GRADE, SALARY, AGE, ADDRESS). Functional dependency…

Q: BANK Code Name Addr Phone BRANCHES ACCTS Acct no San Balance ACCOUNT A.C Name CUSTOMER Type BANK…

A: Relational model corresponding to given ER Diagram of Bank database systems:   1. BANK(Code, Name,…

Q: Assume that there is a one-to-one match in the advisor relationship set. What further restrictions…

A: Introduction: In mathematics, cardinality refers to the number of items in a given set. Database…

Q: Multivalued dependencies are avoided in relation schema when the relation schema conforms to – (a)…

A: Answer: Multivalued dependencies are avoided in relation schema when the relation conforms to 4NF.…

Q: Consider a relation X with six attributes WYSMFE where WS is a composite primary key for X. Assume X…

A: The handwritten solution is provided below:-

Q: Below are three situations where a surrogate key could replace the relation's primary key.

A: - We need to talk about three situations where a surrogate key can replace a relations primary key.

Q: Consider the following relation that involves student data: RADE (ClassName, Section, Term, Grade,…

A: Primary key for the given relation is (ClassName, Section, Term, StudentID)  Here the functional…

Q: Give a Relational Model that corresponds to the Entity-Relationship Diagram in Figure 1. You must…

A: Entity Relationship diagram mainly contains 3 components, that are Entities, Relationships and…

Q: can be converted to a strong entity set by simply adding the appropriate attributes. Why,

A: For the following reasons, a weak entity set is required:

Q: Transform into relational model (relations). IMPORTANT: The diagram needed for the second part uses…

A: Er diagram stands for Entity relationship diagram which contains mainly three components that are…

Q: Describe how functional dependencies may be used to denote the following: • The entity sets student…

A: Functional dependency is a relationship that exists between two attributes. It typically exists…

Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.