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Accurate distinct count, that is, the total number of rows of data with different data values in all data rows, and the same data is calculated only once.

For example, bind two columns "column name" and "value" to the table component. The aggregation method of the column "column name" is the exact different value count. As shown in the figure below, the data total value of the different values in all the values corresponding to "a" The number of counts is 3, that is, there are three rows of data with the column name "a" value of "3", which is calculated according to one line.