Power BI之DAX魔法精华实践教程
DAX 是函数、运算符和常量的集合，可用于公式或表达式中以计算和返回一个或多个值。简而言之，DAX 可帮助您从模型中已有的数据创建新信息。(DAX is a collection of functions, operators, and constants that can be used in formulas or expressions to calculate and return one or more values. In short, DAX helps you create new information from data already in your model.)
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