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10 lines
267 B
MySQL
10 lines
267 B
MySQL
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START TRANSACTION;
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ALTER TABLE track ADD artist_id UUID;
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UPDATE track SET artist_id = (SELECT artist_id FROM album WHERE id = track.album_id);
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ALTER TABLE track ALTER artist_id SET NOT NULL;
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ALTER TABLE track ADD FOREIGN KEY (artist_id) REFERENCES artist;
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COMMIT;
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