DROP TABLE IF EXISTS city;
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CREATE TABLE city
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(
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id bigserial PRIMARY KEY,
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create_time timestamp with time zone NOT NULL,
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update_time timestamp with time zone NOT NULL,
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name varchar(100) DEFAULT '' NOT NULL,
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province_id bigint DEFAULT 0 NOT NULL
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);
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COMMENT ON TABLE city IS '城市表';
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COMMENT ON COLUMN city.name IS '名称';
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COMMENT ON COLUMN city.province_id IS '省id';
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create unique index on city (name, province_id);
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