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10 lines
292 B
SQL
10 lines
292 B
SQL
START TRANSACTION;
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ALTER TABLE track ADD artist_id CHAR(36) AFTER album_id;
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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 MODIFY artist_id CHAR(36) 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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