11 lines
247 B
MySQL
11 lines
247 B
MySQL
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UPDATE vn.town t
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LEFT JOIN vn.zoneGeo zg ON zg.id = t.geoFk
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SET t.geoFk = NULL
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WHERE zg.id IS NULL;
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ALTER TABLE vn.town
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ADD CONSTRAINT town_zoneGeo_FK FOREIGN KEY (geoFk)
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REFERENCES vn.zoneGeo(id)
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ON DELETE RESTRICT
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ON UPDATE CASCADE;
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