How DAX Difference between naked SUM and sum wrapped in CALCULATE

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What is the difference between naked SUM and sum wrapped in CALCULATE?

Measure1 = SUM( tab[col1]) )
Measure2 = CALCULATE ( SUM( tab[col1]) ) )
Oct 8, 2020 in Power BI by anonymous
• 10,520 points
618 views

1 answer to this question.

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This is materially different than the question you asked, because you were asking about two fully defined measures, not two snippets of DAX. The measures will behave identically, because their expansions are logically equivalent:

//Measure 1 definition:
Measure1 = SUM ( 'tab'[col1] )

// Measure 1 expands to the following, and you would use this if you were
// replacing a reference with code:
//Expansion1:
CALCULATE ( SUM ( 'tab'[col1] ) )
//Measure2 definition and expansion:
Measure2 = CALCULATE ( SUM ( 'tab'[col1] ) )

//Expansion2:
CALCULATE ( CALCULATE ( SUM ( 'tab'[col1] ) ) )
answered Oct 8, 2020 by Gitika
• 65,890 points

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