The MacPorts registry.db table "dependencies" has a foreign key column "id" 
referencing ports.id.

How can this query not be empty?

SELECT dependencies.*
FROM dependencies
LEFT JOIN ports ON dependencies.id = ports.id
WHERE ports.id IS null;

With this query I get result rows so I have records in my "dependencies" table 
with a dependencies.id value that DOES NOT match any ports.id value.


Regards,
Bradley Giesbrecht (pixilla)
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