Description: TOPN is a DAX (Data Analysis Expressions) function used in the context of data analysis, particularly in tools like Power BI and other data analysis platforms. Its main function is to return the top N rows from a table based on a specified expression, which can be a measure or a column. This capability allows analysts and report developers to quickly identify the most prominent items within a dataset, facilitating informed decision-making. The TOPN function is particularly useful in scenarios where performance analysis is required, such as in sales, where it can identify the best-selling products or regions with the highest revenue. Additionally, it enables the creation of more effective visualizations by focusing on the most relevant data. The function’s syntax includes parameters such as the number of rows to return, the source table, and sorting expressions, providing flexibility in its application. In summary, TOPN is a powerful tool for data analysis that helps users efficiently and effectively extract key information.
