Comments within DAX in Power BI
In this exercise, we will learn about writing the comments in the dax code itself.
| Comment Type | Marker |
|---|---|
| Single Line Comment | -- or // |
| Multi Line Comment | /* ... */ |
Example: Here are some examples of how to use comments in DAX. Single Line Comments Single line comments start with -- or //.
DAX
-- This is a single line comment
Total Sales = SUM(Sales[SalesAmount])
Total Sales = SUM(Sales[SalesAmount])
DAX
// This is another single line comment
Total Profit = SUM(Sales[SalesAmount]) - SUM(Sales[Cost])
Total Profit = SUM(Sales[SalesAmount]) - SUM(Sales[Cost])
Multi-Line Comments Multi-line comments are enclosed within /* ... */.
DAX
/* This is a multi-line comment
that spans multiple lines.
Useful for longer explanations.
*/
Total Sales = SUM(Sales[SalesAmount])
that spans multiple lines.
Useful for longer explanations.
*/
Total Sales = SUM(Sales[SalesAmount])
DAX
/* Another example
of multi-line comment */
Total Profit = SUM(Sales[SalesAmount]) - SUM(Sales[Cost])
of multi-line comment */
Total Profit = SUM(Sales[SalesAmount]) - SUM(Sales[Cost])
Comments in DAX (Data Analysis Expressions) are useful for several reasons:
- Documentation: They help explain what the code is doing, making it easier for others (or yourself in the future) to understand.
- Debugging: You can comment out parts of the code to isolate problems.
- Clarity: Complex formulas can be broken down into understandable sections.
- Versioning: Temporarily comment out older versions of formulas while testing new ones.