Before jumping to RDBMS, we recommend you to read Introduction to Database Management Systems
Relation Database Management System (RDBMS) works on the mathematical theory of relations. Relational model was first formulated and proposed in 1969 by Edgar F. Codd. A table is called a relation in RDBMS.
Table of Contents
A table is a collection of rows (or tuples) and columns.
A domain is a set of all possible values for a column or a table.
For example, suppose we have a column called course_name in a Course table. Then, the set of all possible course names is the domain.
Examples of domains
You can see that Student roll number and name have completely different domains. Data from one domain cannot be compared with other domain.
Some of the characteristics of domain are:
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Read next: RDBMS – Database Integrity ››
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