Here’s a great video demonstrating the power and flexibility of DAX with 50 real world examples you can download and follow along with the samples files.

Example Index:

  1. (01:27) Filter Context, First Look
  2. (04:40) CALCULATE to change Filter Context with a Boolean Filter
  3. (05:10) CALCULATE and CALCULATETABLE DAX Functions
  4. (06:28) What is a Boolean Filter?
  5. (08:00) First look at the Overwrite Operator in CALCULATE. Merge the Internal Filter Context and External Filter Context
  6. (09:45) CALCULATETABLE to change Filter Context with a Boolean Filter
  7. (11:25) CALCULATE to perform Context Transition
  8. (13:17) All Measures have a Hidden CALCULATE Function
  9. (14:20) Boolean Filter is always converted to a FILTER & ALL DAX Function construction
  10. (17:22) DAX Studio to look at FILTER and ALL Equivalent for a Boolean Filter
  11. (20:00) VALUES rather than ALL in first argument of FILTER
  12. (22:05) VALUES Function to bring a Variable into a Formula and use it as a condition for a Boolean Filter
  13. (24:22) AND Logical Test – 4 Examples
  14. (26:18) Can NOT use two different columns in a Boolean Filters
  15. (28:30) OR Logical Test Boolean Formulas
  16. (30:33) Can NOT Directly Compare Two Columns as a Boolean Filter. Keystone Pricing Examples.
  17. (33:20) DAX Studio to see how FILTER and ALL delivers a table where we directly compare two columns for a DAX Measure
  18. (34:00) Can NOT use MIN or MAX or other aggregate functions as a condition for a Boolean Filter
  19. (34:00) Frequency Distribution DAX Formula. Learn about the COUNTROWS Function
  20. (43:07) ALL DAX Function & Grand Totals. Learn about the Remove Operator in ALL DAX Function when you use it in the Filter argument of CALCULATE
  21. (47:42) Look at Data Model for Power BI File for looking more closely at the Overwrite Operator
  22. (49:00) Overwrite Operation. Second look at the Overwrite Operator in CALCULATE. Merge the Internal Filter Context and External Filter Context into the
  23. Final Filter Context
  24. (50:50) Reminder about ALL before we learn about ALLSELECTED. What is the problem that ALLSELECTED can solve?
  25. (52:35) ALLSELECTED to create Grand Totals that respect the filtering in the PivotTable
  26. (53:33) Context Transition is how ALLSELECTED gets to the Grand Total Cell Filter Context
  27. (53:45) Hidden Context Transition for Measures in an Excel PivotTable or Power BI Visual
  28. (54:45) ALLSELECTED and Context Transition, the Full Story
  29. (56:17) Visual Example of when ALLSELECTED will not get back to the Filter Context of the Grand Total Cell in the Excel PivotTable or Power BI Visual
  30. (57:18) Use ALLSELECTED DAX Function in CALCULATE Measures
  31. (59:05) ALLSELECTED Functions works on Cross Tab Reports too !
  32. (59:44) Example of Measure in Power BI Visual that uses ALLSELECTED and will not get back to the Filter Context of the Grand Total Cell Power BI Visual
  33. (01:01:20) Look at new Data Model for next example
  34. (01:02:20)First example of the KEEPFILTERS DAX Function to force an AND Logical Test rather than an Overwrite Operation
  35. (01:06:55) What is a Complex Filter? What is a Complex Filter Reduction Error?
  36. (01:08:56) How KEEPFILTERS can help solve a Complex Filter Reduction Error for Year Column in AVERAGEX.
  37. (01:14:47) Why KEEPFILTERS is used in the New Quick Measure in Power BI
  38. (01:16:33) How KEEPFILTERS can help solve a Complex Filter Reduction Error for Year Column and Month Column in CROSSJOIN in AVERAGEX
  39. (01:18:30) Data Model solution to solve Complex Filter Reduction Error
  40. (01:20:05) Determine if a filter is a complex filter with CROSSJOIN
  41. (01:21:17) Expanded Table Concept & Relationships.
  42. (01:26:50) Table Filters & Expanded Table as filters in the Filter argument of CALCULATE
  43. (01:27:15) Expanded Table Filter with ALL Function. 2 Examples
  44. (01:29:15) Table Filter to send a filter backwards across a Many-To-One Relationship. Great Visual for understanding this filter
  45. (01:33:10) ALLEXCEPT DAX Function with an Expanded Column
  46. (01:37:00) Examples of Time Intelligence Functions
  47. (01:37:20) Measure for Revenue from Last Year. SAMPERIODLASTYEAR
  48. (01:38:40) Measure for Revenue for Last Month. DATEADD and ISFILTERED DAX Functions
  49. (01:41:32) Compare Excel and DAX Formulas
  50. (01:43:10) Measure for % Change using IF, BLANK, DIVIDE and HASONEVALUE DAX Functions
  51. (01:46:15) DAX Formula Evaluation Context Summary

Charles Sterling and Yana Berkovich walk through how to use personal bookmarks in the Power BI Service and general best practices around using bookmarks in Power BI.

If you are not already familiar with personal bookmark, as a report consumer, you will now be able to create your own set of bookmarks for each report by capturing various states of a report page (including filters, slicers, and state of visuals), give them friendly names, and later return to each state with just one click!

Not only that, you will also be able to make any bookmark that you create the default view, so you can land on your favorite view of the report every time you open it.

Curbal shows you how to unpivot tables with DAX. (whether or not you should do it in DAX may be a different question)

She then unpivots them using Power Query so you can see the difference, and how Power Query can be faster and more efficient for cleaning data.