Validator Overview

The Distinct Values validator ensures a column contains only distinct values or matches expected uniqueness. This validator is useful for ensuring primary key uniqueness, validating composite keys, or monitoring the cardinality of categorical field values over time.

You can configure distinct values validators to monitor the following metrics:

Metric Options	Description
Unique Count	Validates the number of unique rows.
Unique Percentage	Validates the percentage of unique rows.

The distinct values validator works similar to the Volume validator configured for the Unique Count or Unique Percentage metrics. For more information, see Volume validators.

Metric Configuration Parameters

Parameters	Description
Metric	Select the metric to calculate. See the Metric Options table.
Field	Select a source field from a list of available fields with numeric data type. See Field selection.
Filter	(Optional) Select from a list of filters or create a new filter to specify which records to include.
Window	Select from a list of windows or create a new window to specify how to aggregate the data.
Segmentation	(Optional) Apply segmentation to analyze data in separate groups. Default is `Unsegmented`.

Field selection

For the distinct value metrics, you have to specify one or several fields. Specifying several fields means field values are concatenated before being counted, which is, for example, useful when validating uniqueness of composite keys.

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Null values: Validio includes NULL values in the counts, unless you apply a NULL filter to remove them.