## Explain the following constraints : i. Entity integrity constraint. ii. Referential integrity constraint. iii. Domain constraint.

Entity Integrity Constraint: SID Name Class (semester) Age 8001 Ankit 1st 19 8002 Srishti 1st 18 8003 Somvir 4th 22 8004 Sourabh 6th A Referential … Read more

## Explain integrity constraints.

Integrity constraints and Data Consistency: Integrity Constraints in ER Models: In summary, integrity constraints are vital components of database design and management, serving to enforce … Read more

## What are the additional operations in relational algebra ?

Set Intersection Operation (⋂): Natural Join Operation (⨝): Division Operation (÷): Assignment Operation (←): These operations provide a way to manipulate and combine relations in … Read more

## Consider the following relations:

Student (ssn, name, address, major)Course (code, title)Registered (ssn, code)Use relational algebra to answer the following :a. List the codes of courses in which at least … Read more

## Explain constraints and its types.

Constraints Overview: Types of Constraints: 1. NOT NULL: 2. UNIQUE: 3. DEFAULT: 4. CHECK: 5. Key Constraints: a. Primary Key: b. Foreign Key: 6. Domain … Read more

## What is relational model ? Explain with example.

Customer Table (Table 2.1.1): cust_id c_name c_city C_101 Ajay Delhi C_102 Amit Mumbai C_103 Alok Kolkata C_104 Akash Chennai Account Table (Table 2.1.2): acc_no balance … Read more

## What is Unified Modeling Language ? Explain different types of UML.

Unified Modeling Language (UML) is a standardized way for developers to visually represent and design software systems. It helps in specifying, visualizing, constructing, and documenting … Read more

## Explain generalization, specialization and aggregation. OR Compare generalization, specialization and aggregation with suitable examples.

Generalization: Definition: Generalization is like combining two or more similar things to create a more general and abstract things. Example: Think of different types of … Read more

## What do you mean by a key to the relation ? Explain the differences between super key, candidate key and primary key.

The context of databases and relational database management systems (RDBMS), a “key” in a relation refers to a set of one or more attributes (columns) … Read more

## Explain the primary key, super key, foreign key and candidate key with example. OR Define key. Explain various types of keys.

In the context of a Database Management System (DBMS), a “key” refers to a field or combination of fields that is used to uniquely identify … Read more