In the second data flow, the FIL_UpdateChangedRecord Filter transformation allows only changed rows to pass to the Update Strategy transformation UPD_ChangedInserts. In addition, the Filter transformation updates the changed row: it takes the new versions of data from the source qualifier, and uses existing versions of dimension data (passed from the Lookup transformation) to populate the
column fields. UPD_ChangedInserts inserts changed rows to the target. If you select the Effective Date option in the mapping wizard, the Designer creates an Expression transformation, EXP_EffectiveDate_InsertChanged. The Integration Service uses the system date to indicate when it updates a row.