比如你要在创建表时多加一个brand_description
eg: CREATE tdb_goods_brand(brand_id SMALLINT PRIMARY KEY AUTO_INCREMENT,brand_name VARCHAR(128) NOT NULL,brand_description VARCHAR(200) NOT NULL) SELECT brand_name,brand_description FROM tdb_goods GROUP BY brand_name;
假设tdb_goods存在brand_name,brand_description字段的前提下。