10 DAX Functions Every Power BI Learner Should Know!



1. SUM
   Scenario: Calculate the total sales amount.
   DAX Formula: Total Sales = SUM(Sales[SalesAmount])

2. AVERAGE
   Scenario: Find the average sales per transaction.
   DAX Formula: Average Sales = AVERAGE(Sales[SalesAmount])

3. COUNTROWS
   Scenario: Count the number of transactions.
   DAX Formula: Transaction Count = COUNTROWS(Sales)

4. DISTINCTCOUNT
   Scenario: Count the number of unique customers.
   DAX Formula: Unique Customers = DISTINCTCOUNT(Sales[CustomerID])

5. CALCULATE
   Scenario: Calculate the total sales for a specific product category.
   DAX Formula: Total Sales (Category) = CALCULATE(SUM(Sales[SalesAmount]), Products[Category] = "Electronics")

6. FILTER
   Scenario: Calculate the total sales for transactions above a certain amount.
   DAX Formula: High Value Sales = CALCULATE(SUM(Sales[SalesAmount]), FILTER(Sales, Sales[SalesAmount] > 1000))

7. IF
   Scenario: Create a calculated column to categorize transactions as "High" or "Low" based on sales amount.
   DAX Formula: Transaction Category = IF(Sales[SalesAmount] > 500, "High", "Low")

8. RELATED
   Scenario: Fetch product names from the Products table into the Sales table.
   DAX Formula: Product Name = RELATED(Products[ProductName])

9. YEAR
   Scenario: Extract the year from the transaction date.
   DAX Formula: Transaction Year = YEAR(Sales[TransactionDate])

10. DATESYTD
    Scenario: Calculate year-to-date sales.
    DAX Formula: YTD Sales = TOTALYTD(SUM(Sales[SalesAmount]), Sales[TransactionDate])

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