What term is used for the ID numbers linking records in relational database tables?

The term used for the ID numbers that link records in relational database tables is "Keys." Keys play a crucial role in the structure of relational databases by ensuring the integrity of the data and establishing relationships between different tables.

Specifically, a primary key uniquely identifies each record in a table, while foreign keys create a connection between records in different tables, allowing for efficient data retrieval and organization. This relational approach helps maintain data consistency and supports complex queries that join data from multiple tables.

Understanding the concept of keys is fundamental in database design and management, as it directly impacts how data is organized, accessed, and related within the overall database structure.