![]() ![]() Connect the output ports from Rank to target table.Top in Top/Bottom and Number of Ranks as 5.Click Properties Tab and Select Properties as needed.Pass ports from Expression to Rank Transformation.Click Transformation -> Create -> Select RANK from list.Create an EXPRESSION transformation to calculate TOTAL_SAL.Click Mapping-> Create-> Give mapping name.Open folder where we want to create the mapping.Just add one more port Rank_Index to store RANK INDEX. Create a target table EMP_RANK_EXAMPLE in target designer.We cannot Group By on port which is also Rank Port.ġ) Example: Finding Top 5 Salaried Employees.By defining groups, we create one set of ranked rows for each group.For example: If we want to select the top 3 salaried employees of each Department, we can define a group for Department. Rank transformation allows us to group information. We can pass the rank index to another transformation in the mapping or directly to a target.The Power Center Server uses the Rank Index port to store the ranking position for Each row in a group.įor example, if we create a Rank transformation that ranks the top five salaried employees, the rank index numbers the employees from 1 to 5. The Designer automatically creates a RANKINDEX port for each Rank transformation. We must link the Rank port to another transformation. Port we want to pass to other transformation.Ĭan use to store values or calculations to use in an expression. Port to receive data from another transformation. Case Sensitive Comparison can be checked if needed.Cache Directory where cache will be made.It Allows us to select a group of top or bottom values, not just one value.ĭuring the session, the Power Center Server caches input data until it can perform The rank calculations. The Rank transformation allows us to select only the top or bottom rank of data.
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