This dialog is opened to specify only key columns for the data diff for views and query result diff:
This dialog is shown in the following cases:
or 
for a given view or Header text:
Please select columns that should be considered as keys for data diff. Combitation of these column values should be unique across query result:
The dialog shows a list of all columns from both sides which have the same name and data type. You must select one or more columns and value combinations of these columns must be unique across all records on each side. If selected field values are not unique, the corresponding error is shown on OK click and the dialog remains open expecting that some other columns will be selected.
Option Save to diff profile to use by default is available if the Home tab has loaded diff profile, both DBs are loaded, and the dialog is opened from the Object list, Text diff or Batch data diff.
