DRAFT ETL+ Load Replace Example 2 - Primary Key Prevents Duplicates?

Examples of source data and the target tables that result from a Load Replace.
Key point: The so called DW PK column in the Design page does not put a PK in the target table!

Example Configurations

Column named key is designed as the DW PK.

Load Replace requires that at least one column be designated as a DW PK on the Design page.

Initial Load

Source file


Target Table After

ETL+ Preview Table

new Target Table


Log: (4 rows loaded)

2nd Load Replace

Source file

Target Table Before Load

Target Table After Load

Row2 updated, ModifiedSequence = 105


key is designated the Primary Key (DW PK)
Two rows with the same DW PK!

Log: (2 rows replaced)

The result above – 2 rows with the same PK – would not be allowed if the ETL+ created the target table with the PK as designated on the Design page.

Design page for the Target Table shown above.