1.建库

2.建表

新建一个查询，粘贴下列代码，选中执行

#商品分类表 CREATE TABLE category( cid INT PRIMARY KEY, cname VARCHAR(50) ); #商品表 CREATE TABLE products( pid INT PRIMARY KEY, pname VARCHAR(50), price DOUBLE, flag VARCHAR(2), #是否上架标记为：1表示上架、0表示下架 category_id INT, CONSTRAINT products_fk FOREIGN KEY (category_id) REFERENCES category (cid) ); ###################商品分类##################### INSERT INTO category(cid,cname) VALUES('1','家电'); INSERT INTO category(cid,cname) VALUES('2','服饰'); INSERT INTO category(cid,cname) VALUES('3','化妆品'); ##########商品### #商品id#商品名称#商品价格#商品状态#商品所属分类 #全为上架状态 INSERT INTO products(pid,pname,price,flag,category_id) VALUES('1','联想',5000.00,'1',1); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('2','海尔',3000.00,'1',1); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('3','雷神',7000.00,'1',1); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('4','JACK_JONES',800.00,'1',2); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('5','真维斯',200.00,'1',2); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('6','花花公子',450.00,'1',2); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('7','劲霸',700.00,'1',2); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('8','香奈儿',2680.00,'1',3); INSERT INTO products(pid,pname,price,flag,category_id) VALUES('9','相宜本草',590.00,'1',3);

商品分类表：(主键没有自增)

商品表：(主键没有自增)

模型图：