Filter Transformations in Informatica

The Filter transformation provides the means for filtering rows in a mapping. You pass all the rows from a source transformation through the Filter transformation, and then enter a filter condition for the transformation. All ports in a Filter transformation are input/output, and only rows that meet the condition pass through the Filter transformation.

In some cases, you need to filter data based on one or more conditions before writing it to targets. For example, if you have a human resources data warehouse containing information about current employees, you might want to filter out employees who are part-time and hourly.

The mapping passes the rows from a human resources table that contains employee data through a Filter transformation. The filter only allows rows through for employees that make salaries of $30,000 or higher.

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