Power BI Masterclass - Power BI DAX - How to Calculate Ages

The video tutorial introduces DAX in Power BI, focusing on calculating the age of individuals using made-up data from Excel. It covers setting up data, formatting dates, and creating a measure for today's date. The tutorial demonstrates an incorrect method for age calculation and then provides a correct approach using DAX functions like 'floor' and 'year fraction'. The video emphasizes the flexibility of DAX in Power BI, highlighting that multiple solutions exist for similar problems.

What is the first step in setting up data for age calculation in Power BI?

• Calculate today's date

• Format the date column

• Download data from the resource section

• Create a new Power BI report

How can you adjust the text size in a Power BI table?

• By changing the data type

• By using the column tools

• By accessing the formatting options

• By creating a new measure

Which function is used to get today's date in Power BI DAX?

• TODAY()

• CURRENTDATE()

• NOW()

• DATE()

What does the 'has one value' function do in DAX?

• Checks if a column has any values

• Returns true if there is only one value in a column

• Calculates the sum of values in a column

• Formats the date in a column

What is the purpose of the 'selected value' function in DAX?

• To select multiple values from a column

• To return a single value from a column when only one exists

• To format the selected value

• To calculate the average of selected values

Which function is used to round a number down to the nearest significance in DAX?

• CEILING()

• FLOOR()

• TRUNC()

• ROUND()

What is the correct approach to calculate age using DAX?

• Directly subtract the birth date from today's date

• Use the FLOOR and YEARFRAC functions

• Use the SUM function

• Subtract the birth year from the current year