Hello,
I understand you are asking a question regarding Set Operations.
Set Operations can be performed within an analysis, you can read more about it here : https://docs.oracle.com/en/cloud/saas/otbi/otbi-user/advanced-techniques-combine-columns-display-data-differently.html But Set operations cannot be performed on the fly or on demand between 2 objects/analysis that are part of the dashboard, however you can have a third analysis on the dashboard that creates a set between 2 other analysis that you are using in the dashboard.
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Regards,
Gaurav
