sergiom
2020-11-30 04:03:31
过滤器将作为CALCULATE执行的最后一步。当使用多个过滤器时，将对其执行“与”运算。生成的过滤器是现有过滤器的交集。
例如表达式
CALCULATE (
COUNTROWS ( Sales ),
Product[Color] = "Red",
Product[Brand] = "Contoso",
Customer[Continent] = "Asia"
)
将计算表中Sales与之相关的行数，这些行的Products颜色=红色AND品牌= Contoso并出售给居住在亚洲的客户。
为了更好地了解什么是过滤器表，我们必须记住，每个过滤器参数都由DAX扩展为其等效的FILTER表达式，如下所示：
CALCULATE (
COUNTROWS ( Sales ),
FILTER (
ALL ( Product[Color] ),
Product[Color] = "Red"
),
FILTER (
ALL ( Product[Brand] ),
Product[Brand] = "Contoso"
),
FILTER (
ALL ( Customer[Continent] ),
Customer[Continent] = "Asia"
)
)
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