Relational

My Thesis:

The relational data model is designed to handle structured data and is implemented by relational databases.
These databases are the most well-established within the IT industry. They organize the data in two-dimensional tables, also known as relations. These tables consist of rows and columns. Each row usually represents an instance of an entity or relationship, while the columns define the range of values or domains each row can hold. The connections between tables are established through primary and foreign keys. A primary key is a unique identifier for each row in a table, and a foreign key points to the primary key of another table, creating a relationship between the two.
Data manipulation and retrieval in relation databases is performed through Structured Query Language (SQL), a standardized language that enables users to interact with the database.

List of Relational Databases.