diff --git a/src/vitals/core/database.py b/src/vitals/core/database.py
index 5187800..57d5d89 100644
--- a/src/vitals/core/database.py
+++ b/src/vitals/core/database.py
@@ -61,76 +61,78 @@ def get_connection():
 
 def init_db():
     """初始化数据库表"""
-    with get_connection() as conn:
-        cursor = conn.cursor()
-
+    with get_connection() as (conn, cursor):
         # 运动记录表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS exercise (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                user_id INTEGER DEFAULT 1,
+                id INT PRIMARY KEY AUTO_INCREMENT,
+                user_id INT DEFAULT 1,
                 date DATE NOT NULL,
-                type TEXT NOT NULL,
-                duration INTEGER NOT NULL,
-                calories INTEGER DEFAULT 0,
-                distance REAL,
-                heart_rate_avg INTEGER,
-                source TEXT DEFAULT '手动',
+                type VARCHAR(100) NOT NULL,
+                duration INT NOT NULL,
+                calories INT DEFAULT 0,
+                distance FLOAT,
+                heart_rate_avg INT,
+                source VARCHAR(50) DEFAULT '手动',
                 raw_data TEXT,
-                notes TEXT
+                notes TEXT,
+                INDEX idx_exercise_date (date)
             )
         """)
 
         # 饮食记录表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS meal (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                user_id INTEGER DEFAULT 1,
+                id INT PRIMARY KEY AUTO_INCREMENT,
+                user_id INT DEFAULT 1,
                 date DATE NOT NULL,
-                meal_type TEXT NOT NULL,
+                meal_type VARCHAR(50) NOT NULL,
                 description TEXT,
-                calories INTEGER DEFAULT 0,
-                protein REAL,
-                carbs REAL,
-                fat REAL,
-                photo_path TEXT,
-                food_items TEXT
+                calories INT DEFAULT 0,
+                protein FLOAT,
+                carbs FLOAT,
+                fat FLOAT,
+                photo_path VARCHAR(500),
+                food_items TEXT,
+                INDEX idx_meal_date (date)
             )
         """)
 
         # 睡眠记录表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS sleep (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                user_id INTEGER DEFAULT 1,
+                id INT PRIMARY KEY AUTO_INCREMENT,
+                user_id INT DEFAULT 1,
                 date DATE NOT NULL,
-                bedtime TEXT,
-                wake_time TEXT,
-                duration REAL NOT NULL,
-                quality INTEGER DEFAULT 3,
-                deep_sleep_mins INTEGER,
-                source TEXT DEFAULT '手动',
-                notes TEXT
+                bedtime VARCHAR(20),
+                wake_time VARCHAR(20),
+                duration FLOAT NOT NULL,
+                quality INT DEFAULT 3,
+                deep_sleep_mins INT,
+                source VARCHAR(50) DEFAULT '手动',
+                notes TEXT,
+                INDEX idx_sleep_date (date)
             )
         """)
 
         # 体重记录表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS weight (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                user_id INTEGER DEFAULT 1,
+                id INT PRIMARY KEY AUTO_INCREMENT,
+                user_id INT DEFAULT 1,
                 date DATE NOT NULL,
-                weight_kg REAL NOT NULL,
-                body_fat_pct REAL,
-                muscle_mass REAL,
-                notes TEXT
+                weight_kg FLOAT NOT NULL,
+                body_fat_pct FLOAT,
+                muscle_mass FLOAT,
+                notes TEXT,
+                INDEX idx_weight_date (date)
             )
         """)
 
         # 用户配置表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS config (
-                key TEXT PRIMARY KEY,
+                `key` VARCHAR(100) PRIMARY KEY,
                 value TEXT
             )
         """)
@@ -138,57 +140,49 @@ def init_db():
         # 用户表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS users (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                name TEXT NOT NULL UNIQUE,
-                created_at TEXT NOT NULL,
-                is_active INTEGER DEFAULT 0,
-                gender TEXT,
-                height_cm REAL,
-                weight_kg REAL,
-                age INTEGER,
-                password_hash TEXT,
-                email TEXT,
-                is_admin INTEGER DEFAULT 0,
-                is_disabled INTEGER DEFAULT 0
+                id INT PRIMARY KEY AUTO_INCREMENT,
+                name VARCHAR(255) NOT NULL UNIQUE,
+                created_at DATETIME NOT NULL,
+                is_active TINYINT DEFAULT 0,
+                gender VARCHAR(10),
+                height_cm FLOAT,
+                weight_kg FLOAT,
+                age INT,
+                password_hash VARCHAR(255),
+                email VARCHAR(255),
+                is_admin TINYINT DEFAULT 0,
+                is_disabled TINYINT DEFAULT 0
             )
         """)
 
         # 邀请码表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS invites (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                code TEXT NOT NULL UNIQUE,
-                created_by INTEGER NOT NULL,
-                used_by INTEGER,
-                created_at TEXT NOT NULL,
-                expires_at TEXT,
-                FOREIGN KEY (created_by) REFERENCES users(id),
-                FOREIGN KEY (used_by) REFERENCES users(id)
+                id INT PRIMARY KEY AUTO_INCREMENT,
+                code VARCHAR(100) NOT NULL UNIQUE,
+                created_by INT NOT NULL,
+                used_by INT,
+                created_at DATETIME NOT NULL,
+                expires_at DATETIME
             )
         """)
 
         # 阅读记录表
         cursor.execute("""
             CREATE TABLE IF NOT EXISTS reading (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                user_id INTEGER DEFAULT 1,
+                id INT PRIMARY KEY AUTO_INCREMENT,
+                user_id INT DEFAULT 1,
                 date DATE NOT NULL,
-                title TEXT NOT NULL,
-                author TEXT,
-                cover_url TEXT,
-                duration INTEGER DEFAULT 0,
-                mood TEXT,
-                notes TEXT
+                title VARCHAR(500) NOT NULL,
+                author VARCHAR(255),
+                cover_url VARCHAR(1000),
+                duration INT DEFAULT 0,
+                mood VARCHAR(50),
+                notes TEXT,
+                INDEX idx_reading_date (date)
             )
         """)
 
-        # 创建索引
-        cursor.execute("CREATE INDEX IF NOT EXISTS idx_exercise_date ON exercise(date)")
-        cursor.execute("CREATE INDEX IF NOT EXISTS idx_meal_date ON meal(date)")
-        cursor.execute("CREATE INDEX IF NOT EXISTS idx_sleep_date ON sleep(date)")
-        cursor.execute("CREATE INDEX IF NOT EXISTS idx_weight_date ON weight(date)")
-        cursor.execute("CREATE INDEX IF NOT EXISTS idx_reading_date ON reading(date)")
-
 
 # ===== 运动记录 =====