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CREATE TABLE coin (cid INT(8) PRIMARY KEY,
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unit VARCHAR2(20),
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value NUMERIC(8,2), -- just a comment here
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mintage_year INT(8),
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mint_id INT(8),
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CONSTRAINT mint_id_fk FOREIGN KEY(mint_id)
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REFERENCES mint(mid)); --+ MODE = NONTRANSACTIONAL
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CREATE INDEX unit_index ON coin(unit);
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