The Rank transformation
The Rank transformation is used to get a specific number of records from the top or bottom. Consider that you need to take the top five salaried employees from the EMPLOYEE table. You can use the Rank transformation and define the property. A sample mapping indicating the Rank transformation is shown in the following screenshot:
When you create a Rank transformation, a default RANKINDEX output port comes with the transformation. It is not mandatory to use the RANKINDEX port. We have connected the RANKINDEX port to the target as we wish to give the rank of EMPLOYEES based on their SALARY.
When you use a Rank transformation, ...
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