Sumx totals wrong

Hi Anonymous ,

We think the step that caused the difference is that Table 13 has no column8.

Because SUM() is an aggregator function.  It adds up all the values in a single column you specify after applying all filters that will impact the formula. 

SUMX() is an iterator function.  It works through a table, row by row to complete the evaluation after applying all filters.

The Table13 doesn’t have a column to distinguish each row, so when we use the SUM function, it will calculate the total and put it in each row. Then we use the SUMX function, it will iterate each row and add total together.

You also can refer to the following two great articles.

https://exceleratorbi.com.au/use-sum-vs-sumx/

https://radacad.com/sum-vs-sumx-what-is-the-difference-of-the-two-dax-functions-in-power-bi

If you have any question, please kindly ask here and we will try to resolve it.

BTW, pbix as attached.

Best regards,

Community Support Team _ zhenbw

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