COUNT Function

Generates the count of rows in the dataset. Generated value is of Integer type.

NOTE: When added to a transform, the COUNT function calculates the number of rows displayed in the current sample and are not applied to the entire dataset until you run the job. If you change your sample or run the job, the computed values for this function are updated. Transforms that change the number of rows in subsequent recipe steps do not affect the value for the already computed instance of COUNT.

Basic Usage

aggregate value: COUNT() group:postal_code

Output: Generates a two-column table containing the unique values for postal_code and the count of records for that postal_code value.

Syntax

There are no arguments for this function.

For more information on the group parameter, see Aggregate Transform.

Examples

Example - Simple row count

Source:

RowNum
Row 1
Row 2
Row 3
Row 4
Row 5

Transform:

derive value:COUNT() as:'row_count'

sourcerow_count
Row 15
Row 25
Row 35
Row 45
Row 55

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Google Cloud Dataprep Documentation