我需要包含5个表的数据库代码，包含触发器，

好的，这里是一个包含5个表的MySQL数据库代码示例，其中包括触发器：

1. 客户表格

CREATE TABLE customers (
  id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(50) NOT NULL,
  email VARCHAR(50) NOT NULL,
  balance FLOAT NOT NULL DEFAULT 0,
  purchased_books INT NOT NULL DEFAULT 0,
  vip_level INT NOT NULL DEFAULT 0
);

2. 书籍表格

CREATE TABLE books (
  id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  title VARCHAR(50) NOT NULL,
  author VARCHAR(50) NOT NULL,
  price FLOAT NOT NULL,
  inventory INT NOT NULL DEFAULT 0
);

3. 订单表格

CREATE TABLE orders (
  id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  customer_id INT NOT NULL,
  total_amount FLOAT NOT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (customer_id) REFERENCES customers(id)
);

4. 订单详情表格

CREATE TABLE order_items (
  id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  order_id INT NOT NULL,
  book_id INT NOT NULL,
  quantity INT NOT NULL,
  price FLOAT NOT NULL,
  FOREIGN KEY (order_id) REFERENCES orders(id),
  FOREIGN KEY (book_id) REFERENCES books(id)
);

5. 警报表格

CREATE TABLE alerts (
  id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  message VARCHAR(100) NOT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

6. 触发器示例：在订单表格中，创建一个触发器，每当有新订单时，将订单总金额更新到客户的账户余额上。

CREATE TRIGGER update_customer_balance
AFTER INSERT ON orders
FOR EACH ROW
BEGIN
    UPDATE customers
    SET balance = balance - NEW.total_amount
    WHERE id = NEW.customer_id;
END;

7. 触发器示例：在书籍表格中，创建一个触发器，每当库存低于10本时，向管理员发送一条警报。

CREATE TRIGGER low_inventory_alert
AFTER UPDATE ON books
FOR EACH ROW
BEGIN
    IF NEW.inventory < 10 THEN
        INSERT INTO alerts (message, created_at)
        VALUES ('Low inventory for book ' + NEW.title, NOW());
    END IF;
END;

8. 触发器示例：在客户表格中，创建一个触发器，每当客户购买一本书时，更新客户的购买数量，并将客户的VIP等级提升到更高的级别。

CREATE TRIGGER update_customer_vip_level
AFTER INSERT ON order_items
FOR EACH ROW
BEGIN
    UPDATE customers
    SET purchased_books = purchased_books + 1,
        vip_level = CASE
                        WHEN purchased_books >= 10 AND purchased_books < 20 THEN 1
                        WHEN purchased_books >= 20 AND purchased_books < 30 THEN 2
                        WHEN purchased_books >= 30 THEN 3
                        ELSE vip_level
                    END
    WHERE id = NEW.customer_id;
END;

这些代码示例可以作为参考，实际应用需要根据具体情况进行修改。请注意，一些约束、索引和默认值可能需要根据具体需求进行修改。