Assume that attributes with the same name in different relations represent the same domain and that...

Assume that attributes with the same name in different relations represent the same domain and that the primary key attributes in each relation are underlined. Answer the following questions given the relational schema below:

R(A,D)
S(A,B,C,D)
T(C,D,A,H)

List all potential foreign keys in the three relations. (1 mark)
List all superkeys of S. (1 mark)
List all candidate keys of T. (1 mark)
What is the degree and cardinality of S? (1 mark)
If the cardinality of T is N, what is the cardinality of π_C,H(T)? (1 mark)

Expert Solution

Please follow the below answers with explanation.

venereology answered 1 month ago

Assume the following relations are given, Student: <StudentiD, Name, Surname, Major, YearStarted> Write necessary queries for...

Assume the following relations are given, Student: <StudentiD, Name, Surname, Major, YearStarted> Write necessary queries for the followings: 1- Create the table and define necessary constraints (primary key, null constraint, etc.). 2- Insert at least 5 records into the table using Insert SQL.command. 3- Select all students having a major of Computer Engineering, print their name and student ID. 4- Update starting year of all Engineering students to 2015 (use like clause). 5- Delete all student with starting year less...

Q65 Name four (4) categories of domain name conflict. [4 Marks]

Define public relations and explain the different public relations activities.

what are the different ways you can represent the exact same design using: A. VHDL B. ...

what are the different ways you can represent the exact same design using: A. VHDL B. state diagrams C. sequences

1) Create a table “college” that has as attributes name, city name, state/province/region name, country name,...

1) Create a table “college” that has as attributes name, city name, state/province/region name, country name, and year in which the college was established as well as an ID as primary key. Insert records for 5 colleges of your choice, including one or more you have attended. 2) Create a table “student” that has as attributes first name, last names, and college ID for students, and insert the names of yourself and friends who attended one or more colleges together...

Implement a class Student, including the following attributes and methods: Two public attributes name(String) and score...

Implement a class Student, including the following attributes and methods: Two public attributes name(String) and score (int). A constructor expects a name as a parameter. A method getLevel to get the level(char) of the student. score level table: A: score >= 90 B: score >= 80 and < 90 C: score >= 60 and < 80 D: score < 60 Example: Student student = new Student("Zack"); student.score = 10; student.getLevel(); // should be 'D'. student.score = 60; student.getLevel(); //...

Write a class named Person with data attributes for a person’s first name, last name, and...

Write a class named Person with data attributes for a person’s first name, last name, and telephone number. Next, write a class named Customer that is a subclass of the Person class. The Customer class should have a data attribute for a customer number and a Boolean data attribute indicating whether the customer wishes to be on a calling list. Demonstrate an instance of the Customer class in a simple program. Using python

Words that contain different prefixes and the same root can be confusing. Name 15 pairs of...

Words that contain different prefixes and the same root can be confusing. Name 15 pairs of medical terms that have the same root but have different prefixes. Provide the definition for each term.

1. Consider the following relations. The primary keys are underlined. All attributes are of type string...

1. Consider the following relations. The primary keys are underlined. All attributes are of type string if not indicated otherwise.  Student(s_ID, s_name, s_degree: integer, advisorID, d_ID)  Lecture(l_ID, l_name,l_degree: integer, p_ID, d_ID)  Register(s_ID,l_ID,score: integer, Semester)  Professor(p_ID,p_name, d_ID)  Department(d_ID, d_name, address) a. Find the names of professors who have taught in every semester. b. List the names of lectures that the CISE department offers but that are taught by a professor whose department is not CISE. c....

In method overloading, can we have two or more methods with different parameter name and same...

In method overloading, can we have two or more methods with different parameter name and same datatype? Yes No Clear selection When do we need to do Explicit Casting? When LHS and RHS data types are different When size of LHS variable is bigger than LSH When RHS is an expression and not variable When all values of RHS variable or expression are not valid for LSH variable What data type should be used when we want to store any...

Question