What is the difference between SUM and SUMX in DAX? When would you use SUMX?

What is the difference between SUM and SUMX in DAX? When would you use SUMX?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: hard

标签: interviewbit, power-bi, topic-specific, visualization

参考答案摘要

I use SUM when I just need to add up the values of a single column.SUM(Sales[Revenue])SUMX(Sales, Sales[Quantity] * Sales[UnitPrice]) Here, DAX calculates Quantity × UnitPrice for each row first, then...

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