公寓物业管理系统的设计与实现数据库代码

以下是公寓物业管理系统的设计与实现的数据库代码：

-- 物业公司表
CREATE TABLE IF NOT EXISTS property_company (
  id INT(11) NOT NULL AUTO_INCREMENT,
  name VARCHAR(50) NOT NULL,
  address VARCHAR(100) NOT NULL,
  phone VARCHAR(20) NOT NULL,
  PRIMARY KEY (id)
);

-- 租户表
CREATE TABLE IF NOT EXISTS tenant (
  id INT(11) NOT NULL AUTO_INCREMENT,
  name VARCHAR(50) NOT NULL,
  phone VARCHAR(20) NOT NULL,
  gender VARCHAR(10) NOT NULL,
  age INT(11) NOT NULL,
  property_company_id INT(11) NOT NULL,
  apartment_building_id INT(11) NOT NULL,
  room_number VARCHAR(20) NOT NULL,
  start_date DATE NOT NULL,
  end_date DATE NOT NULL,
  PRIMARY KEY (id),
  FOREIGN KEY (property_company_id) REFERENCES property_company(id),
  FOREIGN KEY (apartment_building_id) REFERENCES apartment_building(id)
);

-- 公寓楼表
CREATE TABLE IF NOT EXISTS apartment_building (
  id INT(11) NOT NULL AUTO_INCREMENT,
  name VARCHAR(50) NOT NULL,
  address VARCHAR(100) NOT NULL,
  property_company_id INT(11) NOT NULL,
  PRIMARY KEY (id),
  FOREIGN KEY (property_company_id) REFERENCES property_company(id)
);

-- 房间表
CREATE TABLE IF NOT EXISTS room (
  id INT(11) NOT NULL AUTO_INCREMENT,
  apartment_building_id INT(11) NOT NULL,
  room_number VARCHAR(20) NOT NULL,
  status VARCHAR(20) NOT NULL,
  PRIMARY KEY (id),
  FOREIGN KEY (apartment_building_id) REFERENCES apartment_building(id)
);

-- 维修表
CREATE TABLE IF NOT EXISTS repair (
  id INT(11) NOT NULL AUTO_INCREMENT,
  tenant_id INT(11) NOT NULL,
  room_id INT(11) NOT NULL,
  description VARCHAR(200) NOT NULL,
  status VARCHAR(20) NOT NULL,
  create_time DATETIME NOT NULL,
  update_time DATETIME NOT NULL,
  PRIMARY KEY (id),
  FOREIGN KEY (tenant_id) REFERENCES tenant(id),
  FOREIGN KEY (room_id) REFERENCES room(id)
);

-- 收费表
CREATE TABLE IF NOT EXISTS charge (
  id INT(11) NOT NULL AUTO_INCREMENT,
  tenant_id INT(11) NOT NULL,
  room_id INT(11) NOT NULL,
  amount DECIMAL(10, 2) NOT NULL,
  description VARCHAR(200) NOT NULL,
  create_time DATETIME NOT NULL,
  PRIMARY KEY (id),
  FOREIGN KEY (tenant_id) REFERENCES tenant(id),
  FOREIGN KEY (room_id) REFERENCES room(id)
);

该数据库包含了物业公司、租户、公寓楼、房间、维修、收费等表，通过外键关联实现了表之间的关系。其中，租户和房间表关联，维修和收费表也分别关联租户和房间表。这个数据库可以为公寓物业管理系统提供良好的数据支持。