Power BI is a powerful business intelligence tool developed by Microsoft that allows you to connect to various data sources, transform and model your data, and create interactive visualizations and reports. It provides advanced data analysis and visualization capabilities to help you gain insights and make informed business decisions.
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Load Data in Power BI Desktop
Data Analysis Expressions (DAX) is a formula language used in Power BI, Excel Power Pivot, and Analysis Services Tabular models. It provides a wide range of functions and operators that enable you to perform calculations, manipulate data, and create custom expressions.
DAX is designed to work with tables of data and allows you to create calculated columns, measures, and queries that can be used in your data analysis and reporting tasks. It leverages the relationships defined in your Power BI model to perform calculations and aggregations across multiple tables.
With DAX functions, we can perform various tasks such as filtering data, performing mathematical and statistical calculations, working with dates and times, manipulating text, maintain low level security and more. These functions can be used to create complex calculations and expressions that generate new data based on existing data in your model.
For example, we can use DAX functions to calculate sums, averages, maximums, and minimums of columns or tables, perform calculations based on conditions using IF statements, apply mathematical operations, concatenate strings, and perform time intelligence calculations like year-to-date totals or rolling averages.
DAX expressions are written in formulas that combine functions, operators, and references to columns or tables in your Power BI model. These expressions can be used in calculated columns to create new columns based on existing data, or in measures to aggregate and summarize data within visualizations.
DAX provides a powerful toolset for data analysis and manipulation within Power BI, enabling us to automate complex calculations and generate valuable insights from data.
Top DAX Functions for Power BI
- DAX Date and Time functions
- Information Functions
- Logical Functions
- Mathematical & Trigonometric Functions
- Parent & Child Functions
- Statistical Functions
- Text Function
In next tutorial, we will discuss the DAX function with code in details.
