Are you preparing for GATE CSE, NTA UGC NET, ISRO, or NIELIT Computer Science exams? Understanding DBMS and mastering SQL is crucial for scoring high in competitive exams. This article contains carefully selected practice questions on functional dependencies, normalization (3NF …
Entity-Relationship Diagrams (ERD) Entity-Relationship Diagrams (ERDs) are fundamental tools in database design, offering a clear and graphical way to represent the logical structure of a database. In this detailed guide, we will cover all aspects of ERDs, focusing on …
Removing Redundant Attributes in Entity Sets One of the critical steps in database design using the Entity-Relationship (E-R) model is ensuring the elimination of redundant attributes in entity sets. This process helps to optimize the design, avoid data duplication, …
The Entity-Relationship Model (E-R Model): A Comprehensive Guide The Entity-Relationship (E-R) Model plays a critical role in database design, enabling the creation of an enterprise schema that represents the overall logical structure of a database. This model simplifies mapping real-world …
Why Are Databases Important? Databases are indispensable in today’s professional world. They rank second only to programming as a critical skill for software engineers. Whether you are managing customer data, processing orders, or analyzing trends, databases are at the core …
GATE Question (GATE CSE 1992 | Question: 13b) Suppose we have a database consisting of the following three relations: FREQUENTS(Customer, Hotel): Indicates the hotels each customer visits. SERVES(Hotel, Snack): Tells which snacks each hotel serves. LIKES(Customer, Snack): Indicates which …
Original Question GATE CSE 1990 Question 2(iv): Consider the following relational algebra expression: πA(R ⋈ (S ⋈ T)) where R, S, and T are relations, and A is a set of attributes. Suggest how this expression can be optimized. Detailed …
Gate Question State True or False with reason: Logical data independence is easier to achieve than physical data independence. Answer and Explanation Answer: False Logical data independence is actually more difficult to achieve than physical data independence. Let’s explore why …
