What is aggregator transformation in Informatica?

Aggregator transformation is an active transformation is used to performs aggregate calculations like sum, average, etc. The aggregate operations are performed over a group of rows, so a temporary placeholder is required to store all these records and perform the calculations. For this, aggregator cache memory is used.

How do you use count in aggregator transformation?

Count is aggregator funciton to calculate number of rows and can be nested with one other aggregate function. Any datatype except Binary. Passes the values you want to count. You can enter any valid transformation expression.

How does aggregator transformation handle null values?

treats null values as nulls in aggregate functions. If you pass an entire port or group of null values, the function returns NULL. However, when you configure the PowerCenter Integration Service, you can choose how you want it to handle null values in aggregate functions.

Under which scenarios does sorted input option will not enhance performance of the aggregator transformation?

Also, sorted input cannot be used, when you have nested aggregate function in the aggregator or the session uses incremental aggregation. Maybe, that is the reason aggregator does not automatically sort the data.

How to perform aggregations on source in Informatica?

Double click on the Informatica Aggregator transformation to perform aggregations on the source. From the below screenshot you can see the list of available properties in the Transformation tab: Select Transformation: By default, it will select the transformation you clicked on.

How to create aggregator transformation in Informatica-tekslate?

One is also able to code nested aggregate functions as well. Below is a list of these aggregate functions: Go to the Mapping Designer, click on transformation in the toolbar -> create. Select the Aggregator transformation, enter the name and click create. Then click Done. This will create an aggregator transformation without ports.

How to create a sorter transformation in Informatica?

Open Transformation | click on Create and name it as t_Sorter. Select the transformation and enter name as s_Sorter and click on Create button. From the Source qualifier Transformation drag and drop dept no and Sal into Sorter Transformation as shown below.

How to create aggregate function in aggregator transformation?

You can create an aggregate expression in any output port and use multiple aggregate ports in a transformation. You can use the following aggregate functions within an Aggregator transformation. You can nest one aggregate function within another aggregate function. ♦ AVG: Calculate the Average of the Column values.