DENSERANK Function
Computes the rank of an ordered set of value within groups. Tie values are assigned the same rank, and the next ranking is incremented by 1.
Rank values start at
1
and increment.Ranking order varies depending on the data type of the source data.
You must use the
group
andorder
parameters to define the groups of records and the order of those records to which this function is applied.This function works with the following transforms:
This function assigns ranking of the next value of a set of ties as a single increment more. For more discrete ranking, see RANK Function.
Wrangle vs. SQL: This function is part of Wrangle, a proprietary data transformation language. Wrangle is not SQL. For more information, see Wrangle Language.
Basic Usage
denserank() order:Times group:Racer
Output: Returns the dense ranking of Times
values, grouped by the Racer
column.
Syntax and Arguments
denserank() order: order_col group: group_col
For more information on the order
and group
parameters, see Window Transform.
For more information on syntax standards, see Language Documentation Syntax Notes.
Examples
Tip
For additional examples, see Common Tasks.
Example  Rank Functions
This example demonstrates you to generate a ranked order of values.
Functions:
Item  Description 

RANK Function  Computes the rank of an ordered set of value within groups. Tie values are assigned the same rank, and the next ranking is incremented by the number of tie values. 
DENSERANK Function  Computes the rank of an ordered set of value within groups. Tie values are assigned the same rank, and the next ranking is incremented by 1. 
Source:
The following dataset contains lap times for three racers in a fourlap race. Note that for some racers, there are tie values for lap times.
Runner  Lap  Time 

Dave  1  72.2 
Dave  2  73.31 
Dave  3  72.2 
Dave  4  70.85 
Mark  1  71.73 
Mark  2  71.73 
Mark  3  72.99 
Mark  4  70.63 
Tom  1  74.43 
Tom  2  70.71 
Tom  3  71.02 
Tom  4  72.98 
Transformation:
You can apply the RANK()
function to the Time
column, grouped by individual runner:
Transformation Name 


Parameter: Formulas  RANK() 
Parameter: Group by  Runner 
Parameter: Order by  Time 
You can use the DENSERANK()
function on the same column, grouping by runner:
Transformation Name 


Parameter: Formulas  DENSERANK() 
Parameter: Group by  Runner 
Parameter: Order by  Time 
Results:
After renaming the columns, you have the following output:
Runner  Lap  Time  Rank  RankDense 

Mark  4  70.63  1  1 
Mark  1  71.73  2  2 
Mark  2  71.73  2  2 
Mark  3  72.99  4  3 
Tom  2  70.71  1  1 
Tom  3  71.02  2  2 
Tom  4  72.98  3  3 
Tom  1  74.43  4  4 
Dave  4  70.85  1  1 
Dave  1  72.2  2  2 
Dave  3  72.2  2  2 
Dave  2  73.31  4  3 