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
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
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
Mapping constraints in a database define rules that entities and their relationships must adhere to. Two main types of mapping constraints are mapping cardinalities and … Read more
Question: A university registrar’s office maintains data about the following entities (a) courses, including number, title, credits, syllabus and prerequisites; (b) course offerings, including course … Read more
What is purpose of the ER diagram ? Construct an ERdiagram for a University system which should include information about students, departments, professors, courses, which … Read more
Attributes: Domain: Types of Attributes in a Conceptual Data Model:
An entity relationship model (ER model) is a way of representing the entitiesand the relationships between the entities in order to create a database. Element/Notation … Read more
DBMS interfaces, or Database Management System interfaces, are tools or programs that allow users and applications to interact with a database. They provide a way … Read more
Now, as for SQL, it is primarily a Data Manipulation Language (DML). It is used for querying, updating, and managing data within the database. So, … Read more