如何在MySQL中设计仓库管理系统的表结构来管理仓库位置和货架信息？

-- 创建仓库位置表
CREATE TABLE warehouse_location (
    id INT PRIMARY KEY AUTO_INCREMENT,
    code VARCHAR(20) NOT NULL,
    name VARCHAR(50) NOT NULL,
    description VARCHAR(200),
    status INT DEFAULT 1
);

-- 创建货架信息表
CREATE TABLE shelf (
    id INT PRIMARY KEY AUTO_INCREMENT,
    code VARCHAR(20) NOT NULL,
    name VARCHAR(50) NOT NULL,
    description VARCHAR(200),
    location_id INT,
    status INT DEFAULT 1,
    FOREIGN KEY (location_id) REFERENCES warehouse_location (id) ON DELETE SET NULL
);

-- 插入仓库位置信息
INSERT INTO warehouse_location (code, name, description) VALUES
('WH001', '仓库1', '主要存放食品类货物'),
('WH002', '仓库2', '主要存放电子产品类货物');

-- 插入货架信息
INSERT INTO shelf (code, name, description, location_id) VALUES
('S001', '货架1', '仓库1的货架A', 1),
('S002', '货架2', '仓库1的货架B', 1),
('S003', '货架1', '仓库2的货架A', 2),
('S004', '货架2', '仓库2的货架B', 2);

-- 查询所有仓库位置的信息
SELECT * FROM warehouse_location;

-- 查询仓库1的所有货架信息
SELECT * FROM shelf WHERE location_id = 1;