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The cardinality of a data table. The cardinality of the underlying data table. What is the Cardinality of a GA4 dimension? Google defines the cardinality of a GA4 dimension as the total number of unique values ​​assigned to the dimension. For example, the 'Age' dimension can have the following unique values: Since the “Age” dimension has 7 unique values, the cardinality of the “Age” dimension is 7.


Consider another dimension, 'Gender'. This dimension can have luxembourg number data the following unique values: a stranger male female Since the 'Gender' dimension has 3 unique values, the cardinality of the 'Gender' dimension is 3. Consider another dimension, 'Item Name'. or even thousands of unique values: Suppose the dimension 'Item Name' has 451 unique values. Then its cardinality will be 451. Google defines high cardinality dimensions as dimensions with more than 500 unique values ​​in a day, therefore the dimension 'Item Name' in a day, would be considered as a high cardinality dimension.


What is the Cardinality of a GA4 data table? The cardinality of the data table that you see in a report through the GA4 UI or Data API is the total number of rows reported for the data table. The cardinality of the GA4 data table increases as you apply more dimensions to the report. Suppose you have a data table that contains the following two dimensions: Age and Gender: The cardinality of the 'Age' dimension is 7 and that of the 'Gender' dimension is 3.