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Dedupe a dataset
If you want to remove duplicate entries from a dataset, use the Dedupe transform. For example, to remove the 2 rows that have the same email from this dataset:
To get this dataset:
Drag the dataset file onto the Center pane of Easy Data Transform.
Select the dataset then click the Dedupe transform in the Left pane.
Check Email in the Right pane to remove rows with duplicate emails.
Only the first row with a particular email is kept.
If you only want to remove rows with the same last name and same email, check both Email and Last checkboxes.