diff --git a/database application system.py b/database application system.py
new file mode 100644
index 0000000..e11a77e
--- /dev/null
+++ b/database application system.py	
@@ -0,0 +1,507 @@
+import mysql.connector
+from datetime import datetime
+import tkinter as tk
+from tkinter import messagebox, simpledialog
+import random
+
+# 数据库配置
+db_config = {
+    'host': 'localhost',
+    'user': 'root',
+    'password': '123456',
+    'database': 'mydata'
+}
+
+# 连接到数据库
+conn = mysql.connector.connect(**db_config)
+cursor = conn.cursor()
+
+def select_table():
+    cursor.execute("SELECT * FROM tables WHERE Cz_zt = '空闲'")
+    available_tables = cursor.fetchall()
+    if not available_tables:
+        messagebox.showinfo("提示", "没有空桌子可用。")
+        return None
+
+    table_selection = tk.Toplevel()
+    table_selection.title("选择桌子")
+    tk.Label(table_selection, text="欢迎光临！请选择一个空闲的桌子：", font=("Arial", 14)).pack(pady=10)
+
+    # 创建表格显示桌子信息
+    table_frame = tk.Frame(table_selection)
+    table_frame.pack(pady=10)
+
+    for table in available_tables:
+        table_button = tk.Button(
+            table_frame,
+            text=f"桌号: {table[1]}\n位置: {random.choice(['靠窗', '中央', '角落'])}",
+            width=20,
+            height=2,
+            bg="lightblue",
+            command=lambda t=table: proceed_to_customer_info(t[1], t[0], table_selection)
+        )
+        table_button.pack(pady=5, padx=10, side="top")
+
+def proceed_to_customer_info(cz_number, cz_id, table_selection):
+    cursor.execute("UPDATE tables SET Cz_zt = '占用' WHERE Cz_id = %s", (cz_id,))
+    conn.commit()
+    table_selection.destroy()
+    main_window.cz_id = cz_id
+    messagebox.showinfo("桌子已选择", f"您已选择桌子编号: {cz_number}。")
+    add_customer()  # 自动弹出填写顾客信息的窗口
+
+def add_customer():
+    customer_window = tk.Toplevel()
+    customer_window.title("填写顾客信息")
+
+    tk.Label(customer_window, text="请输入您的信息：", font=("Arial", 14)).pack(pady=10)
+
+    tk.Label(customer_window, text="姓名：").pack()
+    name_entry = tk.Entry(customer_window)
+    name_entry.pack()
+
+    tk.Label(customer_window, text="性别：").pack()
+    sex_entry = tk.Entry(customer_window)
+    sex_entry.pack()
+
+    tk.Label(customer_window, text="电话：").pack()
+    phone_entry = tk.Entry(customer_window)
+    phone_entry.pack()
+
+    def confirm_customer():
+        t_name = name_entry.get()
+        t_rsex = sex_entry.get()
+        t_phone = phone_entry.get()
+        if t_name and t_rsex and t_phone:
+            cursor.execute("INSERT INTO customers (T_name, T_rsex, T_phone) VALUES (%s, %s, %s)", (t_name, t_rsex, t_phone))
+            conn.commit()
+            customer_window.destroy()
+            main_window.t_id = cursor.lastrowid
+            place_order(main_window.t_id, main_window.cz_id)  # 跳转到点餐流程
+        else:
+            messagebox.showwarning("警告", "请完整填写所有信息！")
+
+    tk.Button(customer_window, text="确认", command=confirm_customer).pack(pady=10)
+
+def place_order(t_id, cz_id):
+    cursor.execute("SELECT * FROM menu_items")
+    menu_items = cursor.fetchall()
+    order_window = tk.Toplevel()
+    order_window.title("点餐")
+    tk.Label(order_window, text="菜单：", font=("Arial", 14)).pack(pady=10)
+    selected_items = []
+
+    item_vars = []
+    for item in menu_items:
+        item_var = tk.BooleanVar()
+        tk.Checkbutton(order_window, text=f"{item[1]} - {item[3]}元", variable=item_var).pack(anchor="w")
+        item_vars.append((item_var, item[0]))
+
+    def confirm_order():
+        for var, item_id in item_vars:
+            if var.get():
+                selected_items.append(item_id)
+        if selected_items:
+            # 自动分配空闲服务员
+            cursor.execute("SELECT W_id, W_name FROM workers WHERE W_stat = 0 LIMIT 1")
+            worker = cursor.fetchone()
+            if worker:
+                w_id, w_name = worker
+                # 更新服务员状态为忙碌
+                cursor.execute("UPDATE workers SET W_stat = 1 WHERE W_id = %s", (w_id,))
+                conn.commit()
+
+                time = datetime.now()
+                items_str = ','.join(selected_items)
+                cursor.execute(
+                    "INSERT INTO orders (T_id, time, Cz_id, W_id, items) VALUES (%s, %s, %s, %s, %s)",
+                    (t_id, time, cz_id, w_id, items_str)
+                )
+                order_id = cursor.lastrowid
+                conn.commit()
+
+                # 显示分配的服务员信息
+                messagebox.showinfo("订单成功", f"您的服务员是：{w_name} (ID: {w_id})")
+                order_window.destroy()
+                main_window.order_id = order_id
+                main_window.selected_items = selected_items
+                generate_bill(main_window.order_id, main_window.selected_items)  # 自动生成账单
+            else:
+                messagebox.showwarning("提示", "当前没有空闲的服务员，请稍候再试！")
+        else:
+            messagebox.showwarning("警告", "请选择至少一个菜品。")
+
+    tk.Button(order_window, text="确认点餐", command=confirm_order).pack()
+    order_window.mainloop()
+
+def generate_bill(order_id, selected_items):
+    total_price = 0
+    total_price_after_discount = 0
+    for m_id in selected_items:
+        cursor.execute("SELECT M_price FROM menu_items WHERE M_id = %s", (m_id,))
+        price = cursor.fetchone()[0]
+        cursor.execute("SELECT discount FROM discount_rules WHERE M_id = %s", (m_id,))
+        discount = cursor.fetchone()
+        if discount and discount[0] is not None:
+            discounted_price = price * discount[0]
+        else:
+            discounted_price = price
+        total_price += price
+        total_price_after_discount += discounted_price
+
+    s_price = total_price
+    s_priceafter = total_price_after_discount
+    time = datetime.now()
+    cursor.execute("INSERT INTO bills (O_id, S_price, S_priceafter, time) VALUES (%s, %s, %s, %s)",
+                   (order_id, s_price, s_priceafter, time))
+    conn.commit()
+
+    bill_window = tk.Toplevel()
+    bill_window.title("账单")
+    tk.Label(bill_window, text=f"总价: {s_price}元", font=("Arial", 14)).pack(pady=10)
+    tk.Label(bill_window, text=f"折后价: {s_priceafter}元", font=("Arial", 14)).pack(pady=10)
+
+    def confirm_bill():
+        cursor.execute("UPDATE tables SET Cz_zt = '空闲' WHERE Cz_id = (SELECT Cz_id FROM orders WHERE O_id = %s)", (order_id,))
+        conn.commit()
+        messagebox.showinfo("提示", "账单已确认，感谢您的光临，桌子已重置为空闲。")
+        bill_window.destroy()
+
+    tk.Button(bill_window, text="确认账单", command=confirm_bill).pack(pady=10)
+    bill_window.mainloop()
+
+def show_customers():
+    def edit_customer(t_id):
+        cursor.execute("SELECT * FROM customers WHERE T_id = %s", (t_id,))
+        customer = cursor.fetchone()
+        if customer:
+            edit_window = tk.Toplevel()
+            edit_window.title("编辑顾客信息")
+
+            tk.Label(edit_window, text="姓名：").pack()
+            name_entry = tk.Entry(edit_window)
+            name_entry.insert(0, customer[1])
+            name_entry.pack()
+
+            tk.Label(edit_window, text="性别：").pack()
+            sex_entry = tk.Entry(edit_window)
+            sex_entry.insert(0, customer[2])
+            sex_entry.pack()
+
+            tk.Label(edit_window, text="电话：").pack()
+            phone_entry = tk.Entry(edit_window)
+            phone_entry.insert(0, customer[3])
+            phone_entry.pack()
+
+            def confirm_edit():
+                t_name = name_entry.get()
+                t_rsex = sex_entry.get()
+                t_phone = phone_entry.get()
+                if t_name and t_rsex and t_phone:
+                    cursor.execute("UPDATE customers SET T_name = %s, T_rsex = %s, T_phone = %s WHERE T_id = %s", (t_name, t_rsex, t_phone, t_id))
+                    conn.commit()
+                    edit_window.destroy()
+                    show_customers()  # 刷新顾客信息
+                else:
+                    messagebox.showwarning("警告", "请完整填写所有信息！")
+
+            tk.Button(edit_window, text="确认编辑", command=confirm_edit).pack(pady=10)
+
+    def delete_customer(t_id):
+        if messagebox.askyesno("确认删除", "确定要删除该顾客信息吗？"):
+            # 先删除 orders 表中与该顾客相关的所有记录
+            cursor.execute("DELETE FROM orders WHERE T_id = %s", (t_id,))
+            conn.commit()
+            
+            # 再删除 customers 表中的记录
+            cursor.execute("DELETE FROM customers WHERE T_id = %s", (t_id,))
+            conn.commit()
+            
+            show_customers()  # 刷新顾客信息
+
+    cursor.execute("SELECT * FROM customers")
+    customers = cursor.fetchall()
+    if not customers:
+        messagebox.showinfo("提示", "没有顾客信息。")
+        return
+
+    customer_window = tk.Toplevel()
+    customer_window.title("顾客信息")
+
+    for customer in customers:
+        frame = tk.Frame(customer_window)
+        frame.pack(pady=5, fill=tk.X)
+        tk.Label(frame, text=f"ID: {customer[0]}, 姓名: {customer[1]}, 性别: {customer[2]}, 电话: {customer[3]}", width=40).pack(side=tk.LEFT)
+        tk.Button(frame, text="编辑", command=lambda c=customer[0]: edit_customer(c), width=10).pack(side=tk.RIGHT, padx=5)
+        tk.Button(frame, text="删除", command=lambda c=customer[0]: delete_customer(c), width=10).pack(side=tk.RIGHT, padx=5)
+
+def show_workers():
+    def edit_worker(w_id):
+        cursor.execute("SELECT * FROM workers WHERE W_id = %s", (w_id,))
+        worker = cursor.fetchone()
+        if worker:
+            edit_window = tk.Toplevel()
+            edit_window.title("编辑员工信息")
+
+            tk.Label(edit_window, text="姓名：").pack()
+            name_entry = tk.Entry(edit_window)
+            name_entry.insert(0, worker[1])
+            name_entry.pack()
+
+            tk.Label(edit_window, text="性别：").pack()
+            sex_entry = tk.Entry(edit_window)
+            sex_entry.insert(0, worker[2])
+            sex_entry.pack()
+
+            tk.Label(edit_window, text="状态：").pack()
+            status_entry = tk.Entry(edit_window)
+            status_entry.insert(0, worker[3])
+            status_entry.pack()
+
+            tk.Label(edit_window, text="工资：").pack()
+            salary_entry = tk.Entry(edit_window)
+            salary_entry.insert(0, worker[4])
+            salary_entry.pack()
+
+            def confirm_edit():
+                w_name = name_entry.get()
+                w_sex = sex_entry.get()
+                w_stat = status_entry.get()
+                w_salary = salary_entry.get()
+                if w_name and w_sex and w_stat and w_salary:
+                    cursor.execute("UPDATE workers SET W_name = %s, W_sex = %s, W_stat = %s, W_salary = %s WHERE W_id = %s", (w_name, w_sex, w_stat, w_salary, w_id))
+                    conn.commit()
+                    edit_window.destroy()
+                    show_workers()  # 刷新员工信息
+                else:
+                    messagebox.showwarning("警告", "请完整填写所有信息！")
+
+            tk.Button(edit_window, text="确认编辑", command=confirm_edit).pack(pady=10)
+
+    def delete_worker(w_id):
+        if messagebox.askyesno("确认删除", "确定要删除该员工信息吗？"):
+            # 先删除 orders 表中与该员工相关的所有记录
+            cursor.execute("DELETE FROM orders WHERE W_id = %s", (w_id,))
+            conn.commit()
+            
+            # 再删除 workers 表中的记录
+            cursor.execute("DELETE FROM workers WHERE W_id = %s", (w_id,))
+            conn.commit()
+            
+            show_workers()  # 刷新员工信息
+
+    cursor.execute("SELECT * FROM workers")
+    workers = cursor.fetchall()
+    if not workers:
+        messagebox.showinfo("提示", "没有员工信息。")
+        return
+
+    worker_window = tk.Toplevel()
+    worker_window.title("员工信息")
+
+    for worker in workers:
+        frame = tk.Frame(worker_window)
+        frame.pack(pady=5, fill=tk.X)
+        tk.Label(frame, text=f"ID: {worker[0]}, 姓名: {worker[1]}, 性别: {worker[2]}, 状态: {worker[3]}, 工资: {worker[4]}", width=50).pack(side=tk.LEFT)
+        tk.Button(frame, text="编辑", command=lambda w=worker[0]: edit_worker(w), width=10).pack(side=tk.RIGHT, padx=5)
+        tk.Button(frame, text="删除", command=lambda w=worker[0]: delete_worker(w), width=10).pack(side=tk.RIGHT, padx=5)
+
+def show_menu_items():
+    def edit_menu_item(m_id):
+        cursor.execute("SELECT * FROM menu_items WHERE M_id = %s", (m_id,))
+        item = cursor.fetchone()
+        if item:
+            edit_window = tk.Toplevel()
+            edit_window.title("编辑菜单项")
+
+            tk.Label(edit_window, text="名称：").pack()
+            name_entry = tk.Entry(edit_window)
+            name_entry.insert(0, item[1])
+            name_entry.pack()
+
+            tk.Label(edit_window, text="类型：").pack()
+            type_entry = tk.Entry(edit_window)
+            type_entry.insert(0, item[2])
+            type_entry.pack()
+
+            tk.Label(edit_window, text="价格：").pack()
+            price_entry = tk.Entry(edit_window)
+            price_entry.insert(0, item[3])
+            price_entry.pack()
+
+            def confirm_edit():
+                m_name = name_entry.get()
+                m_type = type_entry.get()
+                m_price = price_entry.get()
+                if m_name and m_type and m_price:
+                    cursor.execute("UPDATE menu_items SET M_name = %s, M_type = %s, M_price = %s WHERE M_id = %s", (m_name, m_type, m_price, m_id))
+                    conn.commit()
+                    edit_window.destroy()
+                    show_menu_items()  # 刷新菜单信息
+                else:
+                    messagebox.showwarning("警告", "请完整填写所有信息！")
+
+            tk.Button(edit_window, text="确认编辑", command=confirm_edit).pack(pady=10)
+
+    def delete_menu_item(m_id):
+        if messagebox.askyesno("确认删除", "确定要删除该菜单项吗？"):
+            # 先删除 discount_rules 表中与该菜单项相关的所有记录
+            cursor.execute("DELETE FROM discount_rules WHERE M_id = %s", (m_id,))
+            conn.commit()
+            
+            # 再删除 menu_items 表中的记录
+            cursor.execute("DELETE FROM menu_items WHERE M_id = %s", (m_id,))
+            conn.commit()
+            
+            show_menu_items()  # 刷新菜单信息
+
+    cursor.execute("SELECT * FROM menu_items")
+    menu_items = cursor.fetchall()
+    if not menu_items:
+        messagebox.showinfo("提示", "没有菜单信息。")
+        return
+
+    menu_window = tk.Toplevel()
+    menu_window.title("菜单信息")
+
+    for item in menu_items:
+        frame = tk.Frame(menu_window)
+        frame.pack(pady=5, fill=tk.X)
+        tk.Label(frame, text=f"ID: {item[0]}, 名称: {item[1]}, 类型: {item[2]}, 价格: {item[3]}", width=50).pack(side=tk.LEFT)
+        tk.Button(frame, text="编辑", command=lambda i=item[0]: edit_menu_item(i), width=10).pack(side=tk.RIGHT, padx=5)
+        tk.Button(frame, text="删除", command=lambda i=item[0]: delete_menu_item(i), width=10).pack(side=tk.RIGHT, padx=5)
+
+def show_bills():
+    def view_bill_details(b_id):
+        cursor.execute("SELECT * FROM bills WHERE B_id = %s", (b_id,))
+        bill = cursor.fetchone()
+        if bill:
+            detail_window = tk.Toplevel()
+            detail_window.title("账单详情")
+            tk.Label(detail_window, text=f"账单ID: {bill[0]}", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"订单ID: {bill[1]}", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"总价: {bill[2]} 元", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"折后价: {bill[3]} 元", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"时间: {bill[4]}", font=("Arial", 14)).pack(pady=10)
+
+    cursor.execute("SELECT * FROM bills")
+    bills = cursor.fetchall()
+    if not bills:
+        messagebox.showinfo("提示", "没有账单信息。")
+        return
+
+    bill_window = tk.Toplevel()
+    bill_window.title("账单信息")
+
+    for bill in bills:
+        frame = tk.Frame(bill_window)
+        frame.pack(pady=5, fill=tk.X)
+        tk.Label(frame, text=f"ID: {bill[0]}, 订单ID: {bill[1]}, 总价: {bill[2]}, 折后价: {bill[3]}, 时间: {bill[4]}", width=70).pack(side=tk.LEFT)
+        tk.Button(frame, text="查看详情", command=lambda b=bill[0]: view_bill_details(b), width=10).pack(side=tk.RIGHT, padx=5)
+
+def show_orders():
+    def view_order_details(o_id):
+        cursor.execute("SELECT * FROM orders WHERE O_id = %s", (o_id,))
+        order = cursor.fetchone()
+        if order:
+            detail_window = tk.Toplevel()
+            detail_window.title("订单详情")
+            tk.Label(detail_window, text=f"订单ID: {order[0]}", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"顾客ID: {order[1]}", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"时间: {order[2]}", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"桌号: {order[3]}", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"服务员ID: {order[4]}", font=("Arial", 14)).pack(pady=10)
+            tk.Label(detail_window, text=f"菜品: {order[5]}", font=("Arial", 14)).pack(pady=10)
+
+    def delete_order(o_id):
+        if messagebox.askyesno("确认删除", "确定要删除该订单吗？"):
+            cursor.execute("DELETE FROM orders WHERE O_id = %s", (o_id,))
+            conn.commit()
+            show_orders()  # 刷新订单信息
+
+    cursor.execute("SELECT * FROM orders")
+    orders = cursor.fetchall()
+    if not orders:
+        messagebox.showinfo("提示", "没有订单信息。")
+        return
+
+    order_window = tk.Toplevel()
+    order_window.title("订单信息")
+
+    for order in orders:
+        frame = tk.Frame(order_window)
+        frame.pack(pady=5, fill=tk.X)
+        tk.Label(frame, text=f"ID: {order[0]}, 顾客ID: {order[1]}, 时间: {order[2]}, 桌号: {order[3]}, 服务员ID: {order[4]}, 菜品: {order[5]}", width=70).pack(side=tk.LEFT)
+        tk.Button(frame, text="查看详情", command=lambda o=order[0]: view_order_details(o), width=10).pack(side=tk.RIGHT, padx=5)
+        tk.Button(frame, text="删除", command=lambda o=order[0]: delete_order(o), width=10).pack(side=tk.RIGHT, padx=5)
+
+def show_discounts():
+    def edit_discount(m_id):
+        cursor.execute("SELECT * FROM discount_rules WHERE M_id = %s", (m_id,))
+        discount = cursor.fetchone()
+        if discount:
+            edit_window = tk.Toplevel()
+            edit_window.title("编辑优惠规则")
+
+            tk.Label(edit_window, text="优惠：").pack()
+            discount_entry = tk.Entry(edit_window)
+            discount_entry.insert(0, discount[1])
+            discount_entry.pack()
+
+            def confirm_edit():
+                d_discount = discount_entry.get()
+                if d_discount:
+                    cursor.execute("UPDATE discount_rules SET discount = %s WHERE M_id = %s", (d_discount, m_id))
+                    conn.commit()
+                    edit_window.destroy()
+                    show_discounts()  # 刷新优惠信息
+                else:
+                    messagebox.showwarning("警告", "请完整填写所有信息！")
+
+            tk.Button(edit_window, text="确认编辑", command=confirm_edit).pack(pady=10)
+
+    def delete_discount(m_id):
+        if messagebox.askyesno("确认删除", "确定要删除该优惠规则吗？"):
+            cursor.execute("DELETE FROM discount_rules WHERE M_id = %s", (m_id,))
+            conn.commit()
+            show_discounts()  # 刷新优惠信息
+
+    cursor.execute("SELECT * FROM discount_rules")
+    discounts = cursor.fetchall()
+    if not discounts:
+        messagebox.showinfo("提示", "没有优惠信息。")
+        return
+
+    discount_window = tk.Toplevel()
+    discount_window.title("优惠信息")
+
+    for discount in discounts:
+        frame = tk.Frame(discount_window)
+        frame.pack(pady=5, fill=tk.X)
+        tk.Label(frame, text=f"ID: {discount[0]}, 优惠: {discount[1]}", width=30).pack(side=tk.LEFT)
+        tk.Button(frame, text="编辑", command=lambda d=discount[0]: edit_discount(d), width=10).pack(side=tk.RIGHT, padx=5)
+        tk.Button(frame, text="删除", command=lambda d=discount[0]: delete_discount(d), width=10).pack(side=tk.RIGHT, padx=5)
+
+def admin_panel():
+    admin_window = tk.Toplevel()
+    admin_window.title("管理员面板")
+
+    tk.Button(admin_window, text="顾客信息", command=show_customers, width=20, height=2).pack(pady=10)
+    tk.Button(admin_window, text="员工信息", command=show_workers, width=20, height=2).pack(pady=10)
+    tk.Button(admin_window, text="菜单", command=show_menu_items, width=20, height=2).pack(pady=10)
+    tk.Button(admin_window, text="账单", command=show_bills, width=20, height=2).pack(pady=10)
+    tk.Button(admin_window, text="订单", command=show_orders, width=20, height=2).pack(pady=10)
+    tk.Button(admin_window, text="优惠信息", command=show_discounts, width=20, height=2).pack(pady=10)
+
+def main():
+    global main_window
+    main_window = tk.Tk()
+    main_window.title("餐厅系统")
+
+    tk.Button(main_window, text="顾客", command=select_table, width=20, height=2).pack(pady=10)
+    tk.Button(main_window, text="管理员", command=admin_panel, width=20, height=2).pack(pady=10)
+
+    main_window.mainloop()
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file