diff --git a/db/database_manager.py b/db/database_manager.py
index fe42066..003ee31 100644
--- a/db/database_manager.py
+++ b/db/database_manager.py
@@ -30,33 +30,33 @@ class DatabaseManager:
             conn.close()
 
     def user_exists(self, phone_number):
-        sql = "SELECT 1 FROM user WHERE phone_number=%s LIMIT 1"
+        sql = "SELECT 1 FROM user WHERE number=%s LIMIT 1"
         result = self.fetch(sql, (phone_number,))
         return len(result) > 0
 
     def insert_user(self, user):
         sql = """
-        INSERT INTO user (nickname, phone_number, password, identity, status)
-        VALUES (%s, %s, %s, %s, %s)
+        INSERT INTO user (name, number, password, status)
+        VALUES (%s, %s, %s, %s)
         """
-        data = (user.nickname, user.phone_number, user.password, user.identity, user.status)
+        data = (user.name, user.number, user.password, user.status)
         # print(data)
         return self.execute(sql, data)
 
-    def valid_login(self, phone_number, password_attempt):
+    def valid_login(self, number, password_attempt):
         # SQL查询获取用户的哈希密码，身份和状态
-        sql = "SELECT password, identity, status,nickname FROM user WHERE phone_number=%s LIMIT 1"
-        result = self.fetch(sql, (phone_number,))
+        sql = "SELECT password, status,name FROM user WHERE number=%s LIMIT 1"
+        result = self.fetch(sql, (number,))
+        print(result)
         if result:
             stored_hash = result[0]['password']  # 假设结果是密码字段
-            identity = result[0]['identity']  # 用户身份
             status = result[0]['status']  # 用户状态
-            nickname = result[0]['nickname']
+            name = result[0]['name']
 
             # 使用bcrypt进行密码验证
             if bcrypt.checkpw(password_attempt.encode('utf-8'), stored_hash.encode('utf-8')):
                 # 密码匹配，返回登录成功，身份和状态
-                return {'valid': True, 'identity': identity, 'status': status, 'nickname': nickname}
+                return {'valid': True, 'status': status, 'name': name}
 
         # 密码不匹配或用户不存在，返回登录失败
         return {'valid': False}
@@ -73,7 +73,7 @@ class DatabaseManager:
 
     def get_current_teacher_courses(self, phone_number):
         # 根据电话号码查询user_id
-        user_sql = "SELECT user_id FROM user WHERE phone_number = %s"
+        user_sql = "SELECT user_id FROM user WHERE number = %s"
         user_result = self.fetch(user_sql, (phone_number,))
 
         if user_result:
@@ -100,3 +100,28 @@ class DatabaseManager:
         result = self.fetch(sql)
         return result
 
+    def get_announcement_info(self):
+        sql = "SELECT course_name, course_type FROM course"
+        result = self.fetch(sql)
+        return result
+
+    def insert_teacher(self, teacher):
+        sql = "INSERT INTO teacher (name, user_id,teacher_number) VALUES (%s, %s, %s);"
+
+        data = (teacher.name, teacher.user_id,teacher.teacher_number)
+        print(data)
+        return self.execute(sql, data)
+
+    def query_user_id(self, phone_number):
+        sql = "SELECT user_id from user WHERE number = %s;"
+        data = self.fetch(sql, phone_number)
+
+        return data[0]['user_id']
+
+    def insert_student(self, student):
+        sql = """
+            INSERT INTO student (student_name, student_number, user_id, major_id, class_name)
+            VALUES (%s, %s, %s, %s, %s)
+            """
+        data = (student.student_name, student.student_number, student.user_id, student.major_id, student.class_name)
+        return self.execute(sql, data)