Python sqlite3 update删除我的行，而不是更新值

import sqlite3

# 连接到数据库
conn = sqlite3.connect('example.db')
c = conn.cursor()

# 创建一个表
c.execute('''CREATE TABLE IF NOT EXISTS employees
             (id INT PRIMARY KEY     NOT NULL,
             name           TEXT    NOT NULL,
             age            INT     NOT NULL,
             deleted        INT     NOT NULL DEFAULT 0);''')

# 插入一些数据
c.execute("INSERT INTO employees (id, name, age) VALUES (1, 'John Doe', 30)")
c.execute("INSERT INTO employees (id, name, age) VALUES (2, 'Jane Smith', 25)")
c.execute("INSERT INTO employees (id, name, age) VALUES (3, 'Bob Johnson', 35)")

# 删除行
c.execute("UPDATE employees SET deleted = 1 WHERE id = 2")

# 提交更改
conn.commit()

# 查询未删除的行
c.execute("SELECT * FROM employees WHERE deleted = 0")
rows = c.fetchall()
for row in rows:
    print(row)

# 关闭数据库连接
conn.close()