Why Do Data Records Disappear After a Deduplication Job?

Deduplication can remove legitimate records when its matching key is too broad or when the chosen survivor rule is unclear. Row counts alone may not reveal which information was lost.

What to check

Review the deduplication key, survivor logic, source IDs, and before-and-after samples. Check whether records with shared names or addresses were treated as the same entity.

Recommended next step

Use reversible staging and a documented matching rule, then reconcile affected records before publishing results. Informatix Systems can review data quality and analytics transformations.