Extracts the ranked unique value from the values in a column, where k=1 returns the maximum value, when a specified condition is met. The value for k must be between 1 and 1000, inclusive. Inputs can be Integer, Decimal, or Datetime.

KTHLARGESTUNIQUEIF 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 four rows with column values 10 , 9 , 9 , and 8, the the function returns 9 for k=2 and 8 for k=3.

Input column can be of Integer, Decimal or 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 unique calculation without conditionals, use the KTHLARGESTUNIQUE function. See KTHLARGESTUNIQUE Function.

kthlargestuniqueif(POS_Sales, 2, DayOfWeek == 'Saturday')

Output: Returns the secondmost value (rank=2) from the POS_Sales column when the DayOfWeek value is Saturday.

kthlargestuniqueif(col_ref, limit, test_expression) [group:group_col_ref] [limit:limit_count]

ArgumentRequired?Data TypeDescription
col_refYstringReference to the column you wish to evaluate.
k_integerYintegerThe ranking of the value to extract from the source column
test_expressionYstringExpression 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 Integer, Decimal, or Datetime values.

NOTE: If the input is in Datetime type, the output is in unixtime format. You can wrap these outputs in the DATEFORMAT function to output the results in the appropriate Datetime format. See DATEFORMAT Function.

Required?Data TypeExample Value
YesString that corresponds to the name of the columnmyValues


Integer representing the unique ranking of the value to extract from the source column.

NOTE: The value for k must be an integer between 1 and 1,000 inclusive.


This parameter contains the expression to evaluate. This expression must resolve to a Boolean (true or false) value.

Required?Data TypeExample Value
YesString expression that evaluates to true or false(LastName == 'Mouse' && FirstName == 'Mickey')

Example - Second-most measurements for a specific city