CountDistinct

The CountDistinct function returns the number of unique values within a column or group.

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The CountDistinct function is an aggregate function.

Aggregate functions evaluate one or more rows of data and return a single value.

In a table element, the aggregate is calculated for each grouping. For information on how to add a grouping with an aggregate calculation to a table, see Group columns in a table.

In a table with no groupings, the aggregate is calculated for each row. For information on how to calculate summary statistics across all rows in a table, see Add summary statistics to a table.

To learn more about using aggregate functions, see Building complex formulas with grouped data.

Syntax

CountDistinct(column)

Function arguments:

• column (required) The column of values to be counted. Duplicate and Null or empty values are not counted.

Example

CountDistinct([City])

• Returns the number of unique city names.