In Tableau, Relationships are a way to link tables from different data sources while maintaining their original granularity and structure. Unlike traditional joins, which combine tables into a single dataset, Relationships keep tables separate and link them at a higher level.

Here’s a quick overview:

• Purpose: Relationships allow you to combine data from multiple tables without merging them into one dataset. This preserves the original data’s granularity and integrity.
• How It Works: When you create a Relationship, Tableau understands how tables relate to each other and combines the data on-the-fly when creating visualizations.
• Benefits: This approach helps avoid data duplication and complexity, especially when working with large or complex datasets. It also allows for more flexible and dynamic data exploration.

Here is a simple video tutorial explaining how to form relationships in Tableau and How to Create Basic Graphs Like Bar Graph & Pie Chart

In summary, Relationships offer a more flexible and efficient way to handle multiple related datasets in Tableau.