Database Map the Hotel ER diagram into relations. The outcome schema should have: - Relations - Primary Key/ Foreign Key connections

Q: re three reasons why the main key of a relation has to be replaced with a surrogate key?

A: Here are three reasons why the main key of a relation has to be replaced with a surrogate key.

Q: how do you translate an Entity Relational Diagram to a Relational Diagram?

A: We are going to learn conversion of Entity Relational Diagram to a Relational Diagram. It takes…

Q: A Parent-Child connection exists between two tables when one holds the primary key of the other as…

A: Given Question:Whenever time one object has the main key of another entity as an attribute, A.…

Q: Explain why an index is only helpful if an attribute's values are sufficiently diverse.

A: Introduction Use of an index with a wide range of values A file index is a table or other data…

Q: How relation listening important?

A: The relationship that is built between people when they communicate is the focus of relational…

Q: relation's main key and its functional interactions amongst its characteristics are interconnected

A: Please find the answer below :

Q: EPCode EPName FundSource Description EXTENSION_PR OGRAM ActCode Venue ActName Budget Date Lname…

A: The relational schema for the given ERD is given below. Since Collaborators is a multivalued…

Q: Explain why an index is only helpful if an attribute's values cover a suitable range. This is the…

A: The above question is answered in step 2 :-

Q: How to Doing "Update-Database" within your code in Entity Framework.

A: The databases used by non-development environment applications frequently need to be updated. After…

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: Conditions that signal to the database designer that supertype and subtype relationships should be…

A: When a generic object is connected to more than one subtype, it is a super-type. Entities within an…

Q: Describe the differences in meaning between the terms relation and relation schema.

A: A relation schema is the combination of list of attributes and their related domain types. An…

Q: A prospective key is an attribute included in a composite primary key.

A: In the realm of database design, keys play a vital role in establishing relationships and ensuring…

Q: What are three reasons why the main key of a relation need to be replaced with a surrogate key?

A: substitute key: It is a key that has no contextual significance but is utilised in data analysis to…

Q: How can we define relation? Identify the characteristics that make up a relation.

A: The table in the relational database or the relationships created between the same tables using…

Q: hand draw an entity-relationship diagram to visually represent a database design this an example,…

A: Given: hand draw an entity-relationship diagram to visually represent a database design

Q: Please transform the following Entity-Relationship Schema (Diagram) into a Relational Schema. Please…

A: Here PNo and SSno are primary key.  The following are the entities : PROJECT, EMPLOYEE, ENGINEER The…

Q: When an attribute is part of a composite primary key, it's also a candidate key.

A: A candidate key is a field or expression that satisfies the requirements for a primary key. It is a…

Q: A candidate key is a characteristic that is included in a composite primary key.

A: A primary key is a key in each tuple which is unique for each tuple present in the table.

Q: address phone_no Place Home Telephone name albumldentifer speed Lives Ssn copyrightDate ide…

A: The sql statements for all the above 9 tables has been created succesfully please refer in step2

Q: Translate the following ER Diagram into relational model. Show different relations that will result…

A: Relational Model is used for modelling data in the form of relations or tables. It represents how…

Q: According to another non-key attribute, what is the connection between the primary key and a non-key…

A: The term "functional dependence" refers to the relationship between two features. A relationship,…

Q: A "candidate key" is: any set of fields that determines the values of all other fields functionally…

A: Let's break down the other options:"any set of fields that determines the values of all other…

Q: A composite primary key has a candidate key for one of its attributes. How would you react to this…

A: Definition: A key is a property or group of properties that allows us to identify a tuple in a…

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: A candidate key is a characteristic that is part of a composite primary key.

A: Candidate key: It is a set of attributes that uniquely identify tuples in a table. Candidate Key is…

Q: Draw an ER-diagram for the following relational schemes. (Hint: bed and wardrobe are both…

A: The Entity-Relationship (E-R) diagram for the given relational schemas is as follows,

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: What is the relationship between the main key and a non-key attribute, according to another non-key…

A: The relationship between any two attributes is known as functional dependence.

Q: A Parent-Child connection exists between two tables when one holds the primary key of the other as…

A: In database management, especially in relational database systems, establishing relationships…

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: E-R diagram to a set of relations.

A: Given :- An ER diagram is given in the above question   Need to write the corresponding Relational…

Q: Deacribe relationship between primary key of a relation and the functional dependencies among all…

A: To be determine: Describe relationship between primary key of a relation and the functional…

Q: Convert any E-R diagram in a Relation.

A:

Q: A composite primary key's prospective key is an attribute?

A: In a database, a composite primary key consists of two or more attributes (columns) that together…

Q: Three instances in which a surrogate key should be constructed for the relation's primary key

A: The following are some of the reasons for creating a surrogate key: When gathering dimensional data…

Q: MAPPING ONE-TO-ONE RELATIONSHIP Nam NURSE Conter N CARE CENTER Location

A: In a one to one relationship one entity is related to another entity such that only one tuple of the…