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. 2019 Oct 8;27(1):109–118. doi: 10.1093/jamia/ocz165

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© The Author(s) 2019. Published by Oxford University Press on behalf of the American Medical Informatics Association.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contactjournals.permissions@oup.com

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Figure 5. — Visual representation of a 2-panel query with the user interface on the left and corresponding compiled SQL representation on the right. The second panel is used as an exclusion criteria and executed using a SQL EXCEPT statement.