💡DAX is an expression language used in Power BI to create calculated columns and measures.
🔍Calculated columns are used to add new columns for better data analysis and visualization.
📉Calculated measures are dynamic aggregations used for metrics and calculations.
📅DAX can be used to build time series analysis and perform calculations across time periods.
🔗Navigation functions in DAX allow you to reference and combine data from different tables.
What is the difference between calculated columns and calculated measures?
—Calculated columns are used to add new columns to a table, while calculated measures are dynamic aggregations used for metrics and calculations.
How can DAX be used for time series analysis?
—DAX can be used to calculate year-to-date sales, year-over-year comparisons, and other time-based calculations.
What are navigation functions in DAX?
—Navigation functions allow you to reference and combine data from different tables in your calculations.
Can DAX be used in Excel or other Microsoft products?
—Yes, DAX can be used in Excel PowerPivot and SSAS Tabular models, in addition to Power BI.
Are there any best practices for using calculated columns in Power BI?
—It is recommended to create calculated columns before bringing them into Power BI, if possible, to improve compression and performance.
00:00Introduction: Mitchell Pearson presents a DAX Workshop focused on mastering Data Analysis Expressions in Power BI.
05:00DAX Fundamentals: DAX stands for Data Analysis Expressions and is an expression language used to create calculated columns and measures in Power BI and other Microsoft products.
10:30Calculated Columns: Calculated columns are used to add new columns to a table, allowing for better data analysis and visualization.
20:15Calculated Measures: Calculated measures are dynamic aggregations used for metrics and calculations, such as total sales, profit, and margin.
30:45Time Series Analysis: DAX can be used to perform time-based calculations and analysis, including year-to-date sales, year-over-year comparisons, and more.
40:55Navigation Functions: Navigation functions in DAX allow you to reference and combine data from different tables, similar to a VLOOKUP in Excel.
50:20Q&A Session: Mitchell answers common questions about calculated columns, calculated measures, time series analysis, navigation functions, and best practices for using DAX in Power BI.
