When using multiple data sources, what is crucial for the transform map?

Choosing appropriate coalesce values is crucial for the transform map when using multiple data sources because coalescing serves as a way to uniquely identify records during the data import process. In ServiceNow, the coalesce field(s) specify which field(s) should be checked to determine if a record already exists in the target table. This is particularly important when integrating data from various sources, as it helps avoid the duplication of records and ensures that updates to existing records are managed correctly.

By setting the right coalesce values, you ensure that the import process recognizes existing records accurately, allowing for seamless data merging and updating. For instance, if two data sources contain similar records, correctly configured coalescing will identify them as the same record and update the information instead of creating duplicates. This is essential for maintaining clean and consistent data in the ServiceNow instance, which directly impacts the integrity of the information relied upon by applications and services built on the platform.