Source qualifier is one of transformations in Informatica that helps you define the basic data set that needs to be loaded to the target system. This is one of the 'extract' steps in the ETL process
source qualifier is an transformation which every mapping should have it defines the source metadata to the Informatica Repository.The source qualfier has different properties like filtering records and joining of two source and so on .
Source qualifier is a transformation which extracts data from the source. Source qualifier acts as SQL query when the source is a relational database and it acts as a data interpreter if the source is a flatfile.
