Links and relationships

In this subject, students will learn how to set up and effectively use relationships between tables to manage complex data structures in relational databases. It begins by explaining how to create relationships between tables to link data in different tables and ensure consistent data organization.

A central part of the subject is the introduction to joins. Students will learn about the different types of joins used to combine data from multiple tables. This begins with an explanation of the basic concept of joins and their importance for data retrieval.

The course then covers specific join types in detail. Students will become familiar with the inner join and the left join to combine data in different ways and create queries that return only relevant records or include records that are missing from one of the tables.

In addition, the right join and full join are explained to further refine the data query and ensure that all relevant data can be included in the analysis, regardless of which table it is in.