Daily DAX : Day 83 YEAR

 Power BI DAX Function: YEAR

Syntax:

DAX

YEAR(date)

Description:

The YEAR function in DAX (Data Analysis Expressions) is used to extract the year from a given date. It takes a single argument, date, which can be a date, a datetime, or even a column containing dates.

Parameters:

    date: A date expression. This can be a column reference containing dates, a date literal (like DATE(2023, 1, 1)), or any expression that evaluates to a date.

Return Value:

    An integer representing the year of the date provided.

Main Use Case:

    Time Intelligence Analysis:

        Yearly Comparisons: One of the primary uses of the YEAR function is in creating time-based calculations or comparisons. For instance, if you want to compare sales, profits, or any other metrics year-over-year, you can use YEAR to group or filter data by year.

    Here's an example where YEAR is used to calculate total sales per year:

    DAX

TotalSalesPerYear = 

CALCULATE(

    SUM(Sales[SalesAmount]),

    ALLEXCEPT(Sales, YEAR(Sales[Date]))

)

In this measure, ALLEXCEPT removes all filters from the Sales table except for the year of the Date column, effectively grouping sales by year.

Date Dimension Tables:

    If you are working with a date dimension table, YEAR can help in creating or populating columns for the year, which can then be used in slicers, filters, or in calculated columns:

DAX

Year = YEAR(DateTable[Date])

Dynamic Reporting:

    For dashboards or reports where users might want to filter or see data for specific years, YEAR can be used in slicers or in DAX measures to dynamically adjust what data is shown based on user selection or parameters.

Age Calculation:

    While not strictly a business metric, calculating the age of items or the tenure of employees can involve YEAR:

DAX

    EmployeeTenure = 

    YEAR(TODAY()) - YEAR(Employees[HireDate])

    This would give you a rough estimate of tenure, though you'd need additional logic for precision around month and day.

In summary, the YEAR function is fundamental for any form of time-based analysis in Power BI, particularly for annual comparisons, trend analysis, or when dealing with any dataset where understanding trends over years is crucial.

https://dax.guide/year/