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Very nice, I've been doing some similar things at work to help map out a data warehouse migration project.

Have you considered outputting to a MermaidJS format?

https://mermaid.js.org/syntax/entityRelationshipDiagram.html

I have not considered outputting to MermaidJS, but (from a quick glance at that documentation) it looks like the same "SQL template" technique should work. Actually doing it is left as an exercise for the reader. :)

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