What are DAX variables (VAR/RETURN)? How do they improve readability and performance?

What are DAX variables (VAR/RETURN)? How do they improve readability and performance?

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 DAX variables to store intermediate results inside a measure so I can reuse them cleanly.VAR SalesLastYear = CALCULATE([Total Sales], SAMEPERIODLASTYEAR(DateTable[Date]))VAR TopProducts = TOPN(1...

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