How can you combine data from multiple tables in Power BI?

Combining data from multiple tables in Power BI can effectively be accomplished by creating relationships or using the Merge Queries feature. Creating relationships allows you to define how tables are connected through common fields, enabling you to create a unified data model where you can perform analytics across these related tables. This approach leverages the power of the data model, maximizing the analytical capabilities of Power BI.

On the other hand, the Merge Queries feature provides a more direct method to combine data by joining tables based on a common key or column. This is particularly useful when you need to bring in additional fields from one table to another, similar to performing a SQL JOIN operation within Power BI's Query Editor. This allows you to manipulate and shape your data according to your reporting requirements.

The other methods listed, such as exporting each table to CSV files or copying and pasting data into a single table, lack the interactive and dynamic capabilities of Power BI. These methods do not allow for maintaining relationships or easily updating data, which are vital for effective data analysis and reporting within a BI environment. Running a SQL query, while a potential method to retrieve data, does not apply directly to the functionality and ease of use provided in Power BI for data integration within its interface.