Relationships between tables

In Power BI, relationships between tables are essential for creating accurate and insightful reports. These relationships define how data from different tables interact with each other when performing analyses or creating visualizations. Here's a detailed overview of how relationships between tables work in Power BI:

Types of Relationships:

One-to-one (1:1):

This is the most common type of relationship in Power BI. It signifies that one record in a table can have multiple related records in another table. For example, each customer can have multiple orders.

Many-to-One (N:1):

This relationship type is essentially the reverse of a one-to-many relationship. Many records in one table can correspond to one record in another table. For instance, multiple orders belong to one customer.

One-to-Many (1:N):

Power BI doesn't support direct one-to-many relationships. One record in table can correspond to many records in another table.

Many-to-Many (N:N):

Power BI doesn't support direct many-to-many relationships. Instead, you typically create a bridge table that resolves the many-to-many relationship into two one-to-many relationships.

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