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Anonymous
Not applicable

Sum Values with an Intermediate Lookup Table

‎09-17-2020 10:15 AM

I have two tables, Courses and Lessons.  A course can have muliple lessons.  A lesson can be in many courses.  Because of this, I have a lookup table (~Lookup_Couse-Lessons) with a 1:Many relationship on each side.  I need a measure for a visual that will calculate the total Course Duration by summing the Duration in Hours for each Lesson within a course.

 

I'm new to DAX, and confused.  I've spent a few days on this, playing with SUMX, FILTER, CALCULATE, and more.  I'm pulling my hair out, and would really appreciate any help!

 

 

daxRelationship

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CNENFRNL
Community Champion
Community Champion

‎09-17-2020 11:48 AM

Hi, @Anonymous , I assume you use a matrix with Courses[Course] in row field, you may try such a measure to sum up durations of lessons composed in corresponding courses.

Sum Duration =
CALCULATE ( SUM ( Lessons[Duration in Hours] ), '~Lookup_Couse-Lessons' )

Thanks to the great efforts by MS engineers to simplify syntax of DAX! Most beginners are SUCCESSFULLY MISLED to think that they could easily master DAX; but it turns out that the intricacy of the most frequently used RANKX() is still way beyond their comprehension!

DAX is simple, but NOT EASY!

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CNENFRNL
Community Champion
Community Champion

‎09-17-2020 11:48 AM

Hi, @Anonymous , I assume you use a matrix with Courses[Course] in row field, you may try such a measure to sum up durations of lessons composed in corresponding courses.

Sum Duration =
CALCULATE ( SUM ( Lessons[Duration in Hours] ), '~Lookup_Couse-Lessons' )

Thanks to the great efforts by MS engineers to simplify syntax of DAX! Most beginners are SUCCESSFULLY MISLED to think that they could easily master DAX; but it turns out that the intricacy of the most frequently used RANKX() is still way beyond their comprehension!

DAX is simple, but NOT EASY!

Message 2 of 3
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Anonymous
Not applicable
In response to CNENFRNL

‎09-17-2020 12:18 PM

Brilliant, thank you!! 

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