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I have several layers and they all have identical table organization. I need to find if there are any features that have a different names but the same UUID. I know that this could be done if I connect QGIS with Postgres but is there any way to do this in QGIS only.

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    What are you expectations regarding the output ? By ”names” do you mean an attribute with names ?
    – Taras ♦
    Commented Jun 10, 2022 at 9:05
  • Can you add an example of what you want to find?
    – Bera
    Commented Jun 10, 2022 at 9:06
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    look at virtual layers, you can run SQL queries against layer(s)
    – JGH
    Commented Jun 10, 2022 at 12:52

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I would merge the layers first, then with field calculator I would create a a virtual field "uuid"||'_'||"name" then using this solution to find duplicates: Identifying duplicate attributes in field using QGIS and then invert selection.

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