diff --git a/dnfs/LICENSE b/dnfs/LICENSE
index 63b4b68..c58cae3 100644
--- a/dnfs/LICENSE
+++ b/dnfs/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) [year] [fullname]
+Copyright (c) 2025 卿松
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/sqlite3/LICENSE b/sqlite3/LICENSE
new file mode 100644
index 0000000..3850104
--- /dev/null
+++ b/sqlite3/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 卿松
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/sqlite3/README.md b/sqlite3/README.md
new file mode 100644
index 0000000..5137202
--- /dev/null
+++ b/sqlite3/README.md
@@ -0,0 +1,251 @@
+
+# Flask SQLite 执行服务
+
+一个轻量级的 Flask HTTP 服务，用于安全地执行带参数的 SQLite SQL 语句，支持 `?` 和命名参数占位符，杜绝 SQL 注入。
+
+## 功能特点
+
+- 通过 JSON 接口发送 SQL 和参数
+- 强制使用参数绑定（`execute(sql, params)`），无 SQL 注入风险
+- 统一返回格式，所有语句执行结果均包含 `data` 数组
+- 自动事务管理，异常时回滚
+- 单线程单进程模式，绑定 127.0.0.1，仅本地访问
+
+## 快速开始
+
+### 环境要求
+
+- Python 3.7+
+- pip
+
+### 安装依赖
+
+```bash
+pip install flask waitress
+```
+
+### 启动服务
+
+```bash
+python app.py
+```
+
+服务运行在 `http://127.0.0.1:5000`，仅允许本地访问。数据库文件 `database.db` 会在首次连接时自动创建（可提前建表或通过接口执行 `CREATE TABLE`）。
+
+## API 文档
+
+### 执行 SQL 语句
+
+**端点**：`POST /execute`
+
+**请求格式**：`Content-Type: application/json`
+
+```json
+{
+  "sql": "SQL 语句，使用 ? 或 :key 作为占位符",
+  "params": [] 或 {}
+}
+```
+
+- `sql`：待执行的 SQL 语句（仅允许单条语句）
+- `params`：参数列表 `[值1, 值2, ...]` 或参数字典 `{"key": 值}`
+
+**成功响应**：
+
+```json
+{
+  "success": true,
+  "data": []          // 查询结果数组，每条记录为字典；非查询语句返回空数组
+}
+```
+
+**错误响应**：
+
+```json
+{
+  "success": false,
+  "error": "错误描述"
+}
+```
+
+## 使用示例
+
+以下示例均通过 `curl` 和 Python `requests` 库演示。
+
+### 1. 创建数据表
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, age INTEGER)"}'
+```
+
+Python 版本：
+
+```python
+import requests
+
+url = "http://127.0.0.1:5000/execute"
+payload = {
+    "sql": "CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, age INTEGER)"
+}
+resp = requests.post(url, json=payload)
+print(resp.json())  # {"success": true, "data": []}
+```
+
+### 2. 插入数据（使用 `?` 占位符）
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "INSERT INTO users (name, age) VALUES (?, ?)", "params": ["Alice", 30]}'
+```
+
+Python 版本：
+
+```python
+payload = {
+    "sql": "INSERT INTO users (name, age) VALUES (?, ?)",
+    "params": ["Bob", 25]
+}
+resp = requests.post(url, json=payload)
+print(resp.json())  # {"success": true, "data": []}
+```
+
+### 3. 插入数据（使用命名参数 `:key`）
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "INSERT INTO users (name, age) VALUES (:name, :age)", "params": {"name": "Charlie", "age": 28}}'
+```
+
+### 4. 查询全部数据
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "SELECT * FROM users"}'
+```
+
+响应示例：
+
+```json
+{
+  "success": true,
+  "data": [
+    {"id": 1, "name": "Alice", "age": 30},
+    {"id": 2, "name": "Bob", "age": 25},
+    {"id": 3, "name": "Charlie", "age": 28}
+  ]
+}
+```
+
+Python 版本：
+
+```python
+payload = {"sql": "SELECT * FROM users"}
+resp = requests.post(url, json=payload)
+users = resp.json()["data"]
+for user in users:
+    print(user["name"], user["age"])
+```
+
+### 5. 按条件查询
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "SELECT * FROM users WHERE age > ?", "params": [26]}'
+```
+
+Python 版本：
+
+```python
+payload = {
+    "sql": "SELECT * FROM users WHERE age > :min_age",
+    "params": {"min_age": 26}
+}
+resp = requests.post(url, json=payload)
+print(resp.json()["data"])
+```
+
+### 6. 更新数据
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "UPDATE users SET age = ? WHERE name = ?", "params": [31, "Alice"]}'
+```
+
+Python 版本：
+
+```python
+payload = {
+    "sql": "UPDATE users SET age = :new_age WHERE id = :user_id",
+    "params": {"new_age": 26, "user_id": 2}
+}
+resp = requests.post(url, json=payload)
+print(resp.json())  # {"success": true, "data": []}
+```
+
+### 7. 删除数据
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "DELETE FROM users WHERE id = ?", "params": [3]}'
+```
+
+Python 版本：
+
+```python
+payload = {
+    "sql": "DELETE FROM users WHERE name = :name",
+    "params": {"name": "Charlie"}
+}
+resp = requests.post(url, json=payload)
+print(resp.json())
+```
+
+### 8. 错误处理示例
+
+当 SQL 或参数错误时，返回明确的错误信息：
+
+```bash
+curl -X POST http://127.0.0.1:5000/execute \
+  -H "Content-Type: application/json" \
+  -d '{"sql": "SELECT * FROM nonexistent_table"}'
+```
+
+响应：
+
+```json
+{
+  "success": false,
+  "error": "no such table: nonexistent_table"
+}
+```
+
+## 安全机制
+
+1. **参数绑定**：使用 `sqlite3` 官方推荐的 `execute(sql, params)` 方式传参，参数值与 SQL 结构完全分离。
+2. **单语句执行**：`sqlite3.execute()` 仅执行第一条语句，无法通过分号注入多条命令。
+3. **错误回滚**：若执行过程中出现异常，已修改的数据会回滚，确保数据一致性。
+4. **本地绑定**：服务监听 `127.0.0.1`，仅本机可访问，避免网络暴露风险。
+
+## 项目结构
+
+```
+.
+├── app.py          # 主程序（使用 waitress 单线程模式）
+└── README.md       # 本文档
+```
+
+数据库文件 `database.db` 会在运行时自动生成。
+
+## 注意事项
+
+- 服务采用 waitress 单线程模式（`threads=1`），确保请求顺序执行，适合低并发场景。
+- 如需处理更高并发，可适当增加 `threads` 参数（例如 `threads=4`），但仍需注意 SQLite 的并发限制。
+- 该服务无认证机制，推荐仅在本机或内网可信环境使用。如需对外服务，请添加鉴权并考虑使用 nginx 等反向代理。
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diff --git a/sqlite3/_run.sh b/sqlite3/_run.sh
new file mode 100644
index 0000000..201be20
--- /dev/null
+++ b/sqlite3/_run.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+cd "$(dirname "$0")" || exit
+source ./venv/bin/activate
+#exec ./main.bin
+exec python3 main.py
diff --git a/sqlite3/_set.sh b/sqlite3/_set.sh
new file mode 100644
index 0000000..477ce1c
--- /dev/null
+++ b/sqlite3/_set.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+cd "$(dirname "$0")" || exit
+python3 -m venv venv
+source venv/bin/activate
+pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
+nuitka --onefile --jobs=1 main.py
diff --git a/sqlite3/main.py b/sqlite3/main.py
new file mode 100644
index 0000000..dbb01a1
--- /dev/null
+++ b/sqlite3/main.py
@@ -0,0 +1,57 @@
+import sqlite3
+from flask import Flask, request, jsonify, g
+from waitress import serve
+
+app = Flask(__name__)
+app.config['DATABASE'] = 'database.db'
+
+def get_db():
+    if 'db' not in g:
+        conn = sqlite3.connect(app.config['DATABASE'])
+        conn.row_factory = sqlite3.Row
+        g.db = conn
+    return g.db
+
+@app.teardown_appcontext
+def close_db(exception):
+    db = g.pop('db', None)
+    if db is not None:
+        db.close()
+
+@app.route('/execute', methods=['POST'])
+def execute_sql():
+    data = request.get_json()
+    if not data or 'sql' not in data:
+        return jsonify({'success': False, 'error': '缺少 sql 字段'}), 400
+
+    sql = data['sql'].strip()
+    params = data.get('params', [])
+
+    # 参数必须是列表、元组或字典
+    if not isinstance(params, (list, tuple, dict)):
+        params = []
+
+    try:
+        db = get_db()
+        cur = db.execute(sql, params)
+        db.commit()
+
+        try:
+            rows = cur.fetchall()
+            result = [dict(row) for row in rows]
+        except Exception:
+            result = []
+
+        return jsonify({
+            'success': True,
+            'data': result
+        })
+    except Exception as e:
+        db = g.get('db')
+        if db:
+            db.rollback()
+        return jsonify({'success': False, 'error': str(e)}), 400
+
+if __name__ == '__main__':
+    # 单线程单进程，绑定 127.0.0.1:8005
+    serve(app, host='127.0.0.1', port=8005, threads=1)
\ No newline at end of file
diff --git a/sqlite3/requirements.txt b/sqlite3/requirements.txt
new file mode 100644
index 0000000..02ebaab
--- /dev/null
+++ b/sqlite3/requirements.txt
@@ -0,0 +1,2 @@
+flask
+waitress
\ No newline at end of file