import sqlite3

# 连接数据库（不存在则创建）
conn = sqlite3.connect('example.db')
cursor = conn.cursor()

# 创建表
cursor.execute('''
    CREATE TABLE IF NOT EXISTS users (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        name TEXT NOT NULL,
        email TEXT UNIQUE
    )
''')

# 插入数据
cursor.execute("INSERT INTO users (name, email) VALUES (?, ?)", 
               ("张三", "zhangsan@example.com"))

# 查询数据
cursor.execute("SELECT * FROM users")
rows = cursor.fetchall()

# 提交事务
conn.commit()
conn.close()

with sqlite3.connect('example.db') as conn:
    cursor = conn.cursor()
    cursor.execute("SELECT * FROM users")
    results = cursor.fetchall()

-- View所有表
.tables

-- View表结构
.schema users

-- 导出数据
.output data.sql
.dump

-- 导入数据
.read data.sql

# 启用 WAL 模式
conn.execute('PRAGMA journal_mode=WAL')