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1: Why is the relation in 1NF? State the reason briefly?
2: Is the relation in 2NF? State your reason briefly with an example?
3: Decompose the relation to 3NF. State the reason why the decomposed connection is in 3NF?
Find the names of items sold on the first and second floors. For each department, list the
department name, and the average salary of the employees is higher, the name and remuneration
of the managers with
.....
You are tasked with designing a relational database for a university management system. The database should store information about students, courses, and instructors. Identify at least three tables needed for this database and define their attributes. Explain the concept of Primary Key and Foreign Key with respect to your database design. Write an SQL query to retrieve the names of all students enrolled in a specific course.
1. Tables and Attributes:
For a university management system, the following tables can be created:
Primary Key: A primary key is a unique identifier for each record in a table. For example, Student_ID in the Students table is a primary key because it uniquely identifies each student.
Foreign Key: A foreign key is an attribute in one table that refers to the primary key in another table. For example, Student_ID in the Enrollments table is a foreign key that links to the Students table, ensuring referential integrity.
3. SQL Query to Retrieve Students Enrolled in a Specific Course:
SQL
CopyEdit
SELECT Students.Name FROM Students JOIN Enrollments ON Students.Student_ID = Enrollments.Student_ID JOIN Courses ON Enrollments.Course_ID = Courses.Course_ID WHERE Courses.Course_Name = 'Database Management Systems';
This query retrieves the names of all students who are enrolled in the "Database Management Systems" course.
Database Assignment Help Sample
by VAH Experts
Database Updated on :
Jun 2025
What is the purpose of database normalization?
Normalization is the process of organizing data in a database. The database must be normalized to reduce redundancy (duplicate data) and ensure that only related data is stored in each table. It also prevents any problems from database modifications such as insertions, deletions, and updates. The stages of the organization are called general forms.
Database Assignment Help Sample
by VAH Experts
Updated on :
Jun 2025
How is the Linux operating system used?
Each version of the Linux OS manages hardware resources, launches and handles applications, and provides some form of the user interface. The large community for developers and the wide range of distributions means that there is a Linux version available for almost any task, and Linux has penetrated many areas of computing.
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1: Why is the relation in 1NF? State the reason briefly?
2: Is the relation in 2NF? State your reason briefly with an example?
3: Decompose the relation to 3NF. State the reason why the decomposed connection is in 3NF?
Find the names of items sold on the first and second floors. For each department, list the
department name, and the average salary of the employees is higher, the name and remuneration
of the managers with no more than ten employees. List the names of the employees who earn
more than any employee in the Deliver department.
4: Relational algebra is a language used to manipulate relational databases. Describe the purpose
of the following commands in relational algebra?
* Select
* Join
* Union
* PRODUCT
5: What function does an attribute of an entity perform in a DBMS?
6: What is deadlock? When might a deadlock occur? Provide an example?
Ans1: 1NF stands for "First Normal Form". It is a relation between the relational databases. Link
in the first standard, the form can only be obtained if and only if the attributes contain domains which is
an intangible value, but the attribute value provides at—least a single cost that forms an area.
Ans2: 2NF stands for " Second Normal Form" A relation is only said 2NF if first, it is in 1NF. In
the second standard form, the attribute which is the non-prime number is solely dependent on the
candidate key. No redundancy of data is present in the second standard form.
Ans3: 3NF stands for " Third Normal Form" The third standard form may be defined as if there
is no dependency of any non-prime attributes, or it may also be defined as if any condition holds
at least one function of non-trivial numbers which is dependent on the X belongs to Y:X which is
known as a super key.
Ans4: Commands *SELECT: The select command is used to select the data from the database.
*JOIN: The command join is used to combine the rows from two tables and in which column is
related to them.
*Union: The operator union command combines a set of results for two or more statements.
*PRODUCT: Product can be only in the form of a table or column.
Ans5: In a database management system the entities which are represented in the tables are known
as attributes, and all the attributes contain values .let's take an example of it an object of student
can contain class, names, and ages but at least there exist values which assign attributes.
Ans6: Deadlock: The term deadlock occurs when multiple processes try the same resource at
the very same time. So one process should have to wait while the other method is completing the
task, the best way to avoid the deadlocks reduce the lock as much as you can.
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At Value Assignment Help we are committed towards ensuring your contentment with your offerings. We offer boundless free modifications allowing you request changes to your database assignment within 14 days of the delivery.
Our team will assiduously address any required concerns or adjustments. Our customer support team is accessible throughout the clock to assist you with any inquiries or difficulties that may occur after delivery. If you have specific feedback from your instructor, our data specialists can offer further insights and implement necessary adjustments to enhance your work. Your success is our primary concern, and we strive to deliver the support you need to thrive in your academics.
Can I see a sample database assignment before placing the order?
We realize the importance of evaluating the quality of our work before you make a commitment. On Value Assignment Help, you can access sample database assignments that include completed projects showcasing our expertise in various database areas, such as SQL queries, normalization, and data modeling. All samples are de-identified to guarantee the confidentiality of our clients while still showcasing the quality and depth of our services. Our sample repository covers a wide range of database assignment solutions, allowing you to find examples that are relevant to your specific needs. We encourage you to explore our Samples Section to gain a better understanding of the quality you can expect from us.
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