Can you explain the principles of the relational model for data storage?

The relational data model is based on representing data in the form of tables (relations), where each table consists of rows (records) and columns (attributes). The main principles:

• Tabular structure: data is organized into tables with unique names.
• Rows — records: each row is a separate object or entity.
• Columns — attributes: each column describes a property of the object.
• Keys: primary key uniquely identifies a row, foreign keys establish relationships between tables.
• Absence of data duplication: normalization helps minimize redundancy.
• Data manipulation through operations: selection, insertion, updating, and deletion using SQL language.

For example, a "Users" table may contain columns ID (primary key), Name, Email. A "Orders" table may reference "Users" through a foreign key UserID, ensuring a link between orders and users.