Power Query is a data transformation and data preparation tool that is part of Microsoft Excel and Power BI (Business Intelligence) applications. It allows users to connect to various data sources, transform and shape the data, and load it into Excel, Power BI, or other data analysis tools for further analysis and reporting. Here are some key features and functionalities of Power Query: 1. Data Source Connectivity: Power Query supports connections to a wide range of data sources, including databases, spreadsheets, web services, text files, and more. It can connect to both on-premises and cloud-based data sources. 2. Data Transformation: Power Query provides a user-friendly interface for performing data transformations such as filtering, sorting, merging, splitting, pivoting, and aggregating data. Users can apply these transformations step by step to clean and reshape data as needed. 3. Query Folding: Power Query is designed to optimize query performance by pushing some data transform...