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79 lines
2.4 KiB
SQL
79 lines
2.4 KiB
SQL
CREATE SCHEMA case_2_ecom;
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COMMENT ON SCHEMA case_2_ecom is '电子商务系统';
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SET SEARCH_PATH = case_2_ecom;
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CREATE TABLE users (
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user_id INT PRIMARY KEY,
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user_name VARCHAR(100),
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user_email VARCHAR(100),
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registration_date DATE,
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user_country VARCHAR(100)
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);
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COMMENT ON TABLE users IS '用户信息表';
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COMMENT ON COLUMN users.user_name IS '用户名';
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COMMENT ON COLUMN users.user_email IS '用户邮箱';
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COMMENT ON COLUMN users.registration_date IS '注册日期';
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COMMENT ON COLUMN users.user_country IS '用户国家';
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CREATE TABLE products (
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product_id INT PRIMARY KEY,
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product_name VARCHAR(100),
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product_price FLOAT
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);
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COMMENT ON TABLE products IS '商品信息表';
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COMMENT ON COLUMN products.product_name IS '商品名称';
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COMMENT ON COLUMN products.product_price IS '商品价格';
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CREATE TABLE orders (
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order_id INT PRIMARY KEY,
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user_id INT,
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product_id INT,
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quantity INT,
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order_date DATE,
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FOREIGN KEY (user_id) REFERENCES users(user_id),
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FOREIGN KEY (product_id) REFERENCES products(product_id)
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);
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COMMENT ON TABLE orders IS '订单信息表';
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COMMENT ON COLUMN orders.quantity IS '数量';
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COMMENT ON COLUMN orders.order_date IS '订单日期';
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INSERT INTO users (user_id, user_name, user_email, registration_date, user_country) VALUES
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(1, 'John', 'john@gmail.com', '2020-01-01', 'USA'),
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(2, 'Mary', 'mary@gmail.com', '2021-01-01', 'UK'),
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(3, 'Bob', 'bob@gmail.com', '2020-01-01', 'USA'),
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(4, 'Alice', 'alice@gmail.com', '2021-01-01', 'UK'),
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(5, 'Charlie', 'charlie@gmail.com', '2020-01-01', 'USA'),
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(6, 'David', 'david@gmail.com', '2021-01-01', 'UK'),
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(7, 'Eve', 'eve@gmail.com', '2020-01-01', 'USA'),
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(8, 'Frank', 'frank@gmail.com', '2021-01-01', 'UK'),
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(9, 'Grace', 'grace@gmail.com', '2020-01-01', 'USA'),
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(10, 'Helen', 'helen@gmail.com', '2021-01-01', 'UK');
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INSERT INTO products (product_id, product_name, product_price) VALUES
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(1, 'iPhone', 699),
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(2, 'Samsung Galaxy', 599),
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(3, 'iPad', 329),
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(4, 'Macbook', 1299),
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(5, 'Apple Watch', 399),
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(6, 'AirPods', 159),
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(7, 'Echo', 99),
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(8, 'Kindle', 89),
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(9, 'Fire TV Stick', 39),
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(10, 'Echo Dot', 49);
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INSERT INTO orders (order_id, user_id, product_id, quantity, order_date) VALUES
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(1, 1, 1, 1, '2022-01-01'),
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(2, 1, 2, 1, '2022-02-01'),
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(3, 2, 3, 2, '2022-03-01'),
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(4, 2, 4, 1, '2022-04-01'),
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(5, 3, 5, 2, '2022-05-01'),
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(6, 3, 6, 3, '2022-06-01'),
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(7, 4, 7, 2, '2022-07-01'),
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(8, 4, 8, 1, '2022-08-01'),
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(9, 5, 9, 2, '2022-09-01'),
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(10, 5, 10, 3, '2022-10-01');
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COMMIT;
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