Extracts the ranked Datetime value from the values in a column, where |
KTHLARGESTDATEIF calculations are filtered by a conditional applied to the group.
For purposes of this calculation, two instances of the same value are treated as the same value of k. So, if your dataset contains three rows with column values 2020-02-15, 2020-02-14, and 2020-02-14, then KTHLARGESTDATEIF returns 2020-02-14 for k=2 and 2020-02-14 for k=3.
Input column must be of Datetime type. Other values column are ignored. If a row contains a missing or null value, it is not factored into the calculation.
NOTE: When added to a transformation, this function is applied to the current sample. If you change your sample or run the job, the computed values for this function are updated. Transformations that change the number of rows in subsequent recipe steps do not affect the values computed for this step. |
To perform a simple kth largest calculation on Datetime values without conditionals, use the KTHLARGESTDATE function. See KTHLARGESTDATE Function.
For a version of this function that applies to non-Datetime values, see KTHLARGESTIF Function.
kthlargestdateif(transDate, 2, salesPerson == 'jsmith') |
Output: Returns the secondmost recent Date (rank=2) from the transDate column when the salesPerson value is jsmith.
kthlargestdateif(col_ref, limit, test_expression) [group:group_col_ref] [limit:limit_count] |
| Argument | Required? | Data Type | Description |
|---|---|---|---|
| col_ref | Y | string | Reference to the column you wish to evaluate. |
| k_integer | Y | integer | The ranking of the value to extract from the source column |
| test_expression | Y | string | Expression that is evaluated. Must resolve to true or false |
For more information on the group and limit parameter, see Pivot Transform.
Name of the column whose values you wish to use in the calculation. Inputs must be Datetime values.
| Required? | Data Type | Example Value |
|---|---|---|
| Yes | String that corresponds to the name of the column | transactionDate |
Integer representing the ranking of the value to extract from the source column.
NOTE: The value for |
k=1 represents the maximum value in the column. k.This parameter contains the expression to evaluate. This expression must resolve to a Boolean (true or false) value.
| Required? | Data Type | Example Value |
|---|---|---|
| Yes | String expression that evaluates to true or false | (LastName == 'Mouse' && FirstName == 'Mickey')
|