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How to union two polygon shapefiles by one or more attribute fields in QGIS

Given that your two layers presumably have the same attributes, you can just copy and paste: Edit -> Select -> Select All Features Edit -> Copy Features (Ctrl-C on Windows) Switch to other ...
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How to union two polygon shapefiles by one or more attribute fields in QGIS

You can use SQL with UNION operator. If you can have duplicate records, you should use UNION ALL, or the duplicates are dropped. SELECT * FROM "LayerA" UNION SELECT * from "LayerB" ...
BERA's user avatar
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