数据聚合就是降低数据颗粒度的过程。 颗粒度即数据的详细级别。Granularity is the level of detail of the data. 一、使用场景 在数据分析的过程中,我们经常会调整数据的颗粒度(granularity),比如上面说的不同的销售数据,这就需要在数据整理的过程中调整数据的颗粒度。Tableau Prep通过聚合(aggregate)的功能降低数据...
Tableau的高级计算是通过计算字段来完成的。 计算字段的本质是通过表达式,基于数据源中已有的数据创建数据源中不存在的数据。 计算字段分类 计算字段分为以下几类: Basic calculations:数据源级别((a row-level calculation))或者可视化级别(an aggregate calculation) Level of Detail (LOD) expressions : 可以更加精细...
Data blending can combine 2 different dataresources, we will have 1 primary datasource, and 1+ secondary datasouces. The secondary data souce will aggregate to a propriate level before blending. Data blending simulates atraditional left join. The main difference between the two is when the agg...
This article introduces aggregate functions and their uses in Tableau. It also demonstrates how to create an aggregate calculation using an example. Why use aggregate functions Aggregate functions allow you to summarize or change the granularity of your data. For example, you might want to know exa...
"can not mix aggregate and non aggregate arguments with this function" please help upvote reply chris mcclellan (member) 3 years ago oops, sorry ... this will work: sum([total offices]) - sum({fixed : sum([number of office])}) 3 years ago (member) l...
It can provide a way to aggregate dimensions when computing table calculations, which require an aggregate expression. It can improve query performance because it’s computed Tableau computes Attribute using the following formula:IF MIN([dimension]) = MAX([dimension]) THEN MIN([dimension]) ELSE "...
It provides a way to aggregate the dimension when computing table calculations, which require an aggregate expression. It improves query performance due to locally computed. Tableau calculates the Attribute using the below given formula: If MIN (dimension) = MAX (dimension) then MIN (dimension)else...
extract的时候可以aggregate data for visible dimensions , 把data roll up to 某一个level. (pre calculate the default aggregation for each measure of all the dimensions in the table, 会使得build new view 更快,因为简化了数据) -refresh data ...
edited by tableau community may 8, 2020 at 8:02 pm your total calculated field is an aggregate because it's adding two sums (sum([v1])+sum([v2])), so the return values of the kpi all calculation must both be aggregates. you can fix this by changing [profit] to sum([profit]) ...
Unlike in other BI solutions, notallfact tables are forced to conform toallcommon dimension tables in Tableau—plus, you don’t need to worry about directional filters. This means you can aggregate measures from separate base tables, which do not have direct relationship to each other, to dime...