Friday 29 December 2023

What are the most common Dax functions used in the project ? Power BI interview questions and answers 188

 What are the most common Dax functions used in the project ?

I'd be glad to provide information on the most common DAX functions used in Power BI projects, but I'll need more context to give you the most relevant answer. Please share the following details:

Specific Project Information:

  • Industry or domain: What type of data are you working with? (e.g., sales, finance, healthcare, etc.)

  • Key business questions: What are the primary insights you're aiming to extract from the data?

  • Project goals: What are you hoping to achieve with the Power BI solution?

Common DAX Functions Across Projects:

While I await those details, here are some of the most frequently used DAX functions across various Power BI projects:


  • SUM: Calculates the sum of values in a column.

  • COUNT: Counts the number of items in a column.

  • AVERAGE: Calculates the average of values in a column.

  • MIN: Finds the minimum value in a column.

  • MAX: Finds the maximum value in a column.

  • DISTINCTCOUNT: Counts the number of unique values in a column.

Time Intelligence:

  • DATEADD: Adds or subtracts a specified time period from a date.

  • DATEDIFF: Calculates the difference between two dates in a specified time unit.

  • SAMEPERIODLASTYEAR: Compares a measure with its value in the same period of the previous year.

  • TOTALYTD: Calculates a year-to-date total for a measure.

Filtering and Context Manipulation:

  • FILTER: Creates a filtered table based on specified conditions.

  • ALL: Removes all filters from a context.

  • ALLSELECTED: Removes filters applied in the current visual or filter pane, but retains slicer and report-level filters.

  • CALCULATE: Modifies the filter context for a calculation.


  • IF: Performs conditional logic (evaluates a condition and returns one value for true, another for false).

  • SWITCH: Evaluates multiple expressions and returns the first one that matches a condition.

Text Manipulation:

  • CONCATENATE: Joins multiple text strings into a single text string.

  • LEFT: Returns the first characters of a text string.

  • RIGHT: Returns the last characters of a text string.

  • MID: Returns a portion of a text string starting at a specified position.

Once you provide more information about your project, I can offer a more tailored list of common DAX functions that are likely to be relevant for your specific use case.

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