Understanding Data Sources in Power BI

What Is a Data Source?

A data source is the location from which an application retrieves information. It may be a file on your computer, a database on a server, or a cloud-based application.

For example, a retail company might store sales transactions in a database, product information in an Excel workbook, and monthly targets in a CSV file. Power BI can connect to these sources to support combined analysis.

Common Data Sources

1. Excel Workbooks

Excel files are frequently used for sales records, budgets, employee information, and financial reports. Power BI can import supported Excel tables and worksheets.

2. CSV and Text Files

CSV files store tabular information as text, with values separated by delimiters such as commas. They are commonly used to exchange data between applications.

3. Relational Databases

Power BI supports connectors for databases such as SQL Server and PostgreSQL, along with other supported database systems.

Database connections are useful when working with large datasets or information that changes regularly.

4. Web Sources

Power BI can retrieve data from supported web sources, including certain web pages and APIs. The connection method depends on how the source exposes its data and handles authentication.

5. Cloud Services

Power BI can connect to supported cloud platforms and business applications. These connections allow organizations to analyze information stored outside their local computers.

Choosing the Right Data Source

The best source depends on where the data is maintained, how frequently it changes, its size, and the required security controls.

For example, a small business may manage its monthly sales in Excel, while a large organization may maintain transactions in a centralized database.

Understanding the source helps you select an appropriate connector and connection method.