![]() Note: The Count (Distinct) aggregation is not supported for Microsoft Access data sources, and for Microsoft Excel and Text File data sources using the legacy connection. ![]() So the dimension actually takes on the characteristics of a measure. You aggregate a dimension, you create a new temporary measure column, You can aggregate a dimension in the view as Minimum, Maximum, Count, or Count (Distinct). You can change the aggregation for a measure in the view from its context menu: In Tableau, multidimensional data sources are supported only in Windows. Sources contain data that is already aggregated. You can view or change the default aggregation for a measure-see Set the Default Aggregation for a Measure. Every measure has a default aggregation which is set by Tableau when you connect to a data source. The current aggregation appears as part of the measure's name in the view. Sum, average, and median are common aggregations for a complete list, see List of Predefined Aggregations in Tableau. When you add a measure to the view, Tableau automaticallyĪggregates its values. Change the Aggregation of a Measure in the View Use your (Link opens in a new window) account to sign in. Watch a Video: To see related concepts demonstrated in Tableau, watch Aggregation, Granularity, and Ratio Calculations (Link opens in a new window), a 4-minute free training video. The type of aggregation applied varies depending on the context of the view. Whenever you add a measure to your view, an aggregation is applied to that measure by default. ![]() In Tableau, you can aggregate measures or dimensions, though it is more common to aggregate measures. ![]()
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