Power Query is a powerful ETL tool (Extract, Transform, Load) that is integrated directly into Microsoft Excel. It allows you to import, clean, and prepare data from a variety of sources—without having to write a single line of VBA code. For Swiss companies that regularly work with financial, personnel, or production data, Power Query is an indispensable tool.
Features
Data Import
Power Query supports over 100 data sources: from CSV and Excel files to SQL Server and SharePoint lists, as well as web APIs and SAP systems. In practice, this means that you can, for example, consolidate sales data from your ERP, personnel data from SharePoint, and market data from a website into a single query. For Swiss SMEs, the connection to local databases and cloud services like Azure SQL is particularly relevant.
Transformation
The query editor provides a visual interface for data transformations: renaming columns, changing data types, filtering rows, removing duplicates, splitting or merging columns. Each step is recorded as an "Applied Step" and can be adjusted at any time. Advanced users can directly edit the M language (Power Query Formula Language) to create complex logics such as conditional columns, custom functions, or nested queries.
Automation
Once created, queries can be updated with a click. In combination with Power BI, data can be automatically updated on a schedule. This way, decision-makers always receive up-to-date dashboards without having to manually copy data. Excel files hosted in SharePoint can even utilize automatic update cycles.
Use Cases
Reporting
A Swiss financial service provider uses Power Query to consolidate monthly reports from five different systems. What used to take three working days is now completed by Power Query in just a few minutes. Employees can focus on analysis rather than data preparation.
Data Cleaning
Address data with different formats, missing postal codes, or inconsistent cantonal designations—Power Query systematically cleans such data. This saves significant time, especially when consolidating customer data from various systems.
Aggregation
For consolidated reporting, data from multiple branches, departments, or subsidiaries can be automatically merged and aggregated. The integration with Power BI then allows for interactive visualizations for management.
Conclusion
Power Query turns Excel into a professional data preparation platform. Especially for Swiss companies that work with multilingual data and various systems, Power Query offers a tremendous productivity boost. Getting started is easy, and the possibilities grow with your requirements.