diff --git a/StatCalc/api/statcalc_api.py b/StatCalc/api/statcalc_api.py
index d34051e..e2e4b35 100644
--- a/StatCalc/api/statcalc_api.py
+++ b/StatCalc/api/statcalc_api.py
@@ -35,7 +35,7 @@ def get_students(g:get_student_dao = Depends()
     ,description=f'查询每次考试成绩都在80分以上的学生的编号，姓名和成绩。'
                   )
 def get_students(db=Depends(get_db)):
-    result = get_student_dao( db=db )
+    result = get_score_80( db=db )
     if result:
         return result
     raise HTTPException(status_code=404, detail="没有找到符合条件的学生")
diff --git a/StatCalc/dao/statcalc_dao.py b/StatCalc/dao/statcalc_dao.py
index 2d2d1a5..97bd011 100644
--- a/StatCalc/dao/statcalc_dao.py
+++ b/StatCalc/dao/statcalc_dao.py
@@ -39,9 +39,11 @@ def get_class_count(g , db):
 from scores.model.score_model import Score
 
 def get_score_80(db):
-    q = (db.query(Score)
-         .filter(Score.score>=80)
-         .all())
+    q = ( db.query(Score)
+          .group_by(Score.score)
+          .having( min(Score.score) >= 80)
+          .all()
+         )
     return q
 
 
diff --git a/StatCalc/main.py b/StatCalc/main.py
index f47a322..21cf54b 100644
--- a/StatCalc/main.py
+++ b/StatCalc/main.py
@@ -1,7 +1,6 @@
 from fastapi import FastAPI,APIRouter
 from StatCalc.api.statcalc_api import statcalc_api
 from databases import *
-from StatCalc.model import statcalc_model
 from contextlib import asynccontextmanager
 
 StatCalc_API = APIRouter()
diff --git a/Teachers/main.py b/Teachers/main.py
index 583ea6b..ffe9558 100644
--- a/Teachers/main.py
+++ b/Teachers/main.py
@@ -11,9 +11,9 @@ Teachers_API.include_router(tea_api)
 app = FastAPI()
 app.include_router(tea_api,tags=["老师"])
 
-Base.metadata.create_all(engine1)
-
 if __name__ == "__main__":
+    Base.metadata.create_all(engine1)
+
     import uvicorn
     uvicorn.run('main:app', host='0.0.0.0', port=57000)
     """
diff --git a/class_management/main.py b/class_management/main.py
index 991457d..780a49b 100644
--- a/class_management/main.py
+++ b/class_management/main.py
@@ -12,8 +12,6 @@ app = FastAPI()
 
 app.include_router(class_api)
 
-
-
 if __name__ =='__main__':
     Base.metadata.create_all(engine)
 
diff --git a/main.py b/main.py
index 6432ac7..ab6c36d 100644
--- a/main.py
+++ b/main.py
@@ -17,9 +17,10 @@ app.include_router(Teachers_API,tags=["teachers"])
 # app.include_router(StatCalc_API,tags=["StatCalc"])
 
 
-Base_all.metadata.create_all(bind=engine_all)
 
 if __name__ == "__main__":
+    Base_all.metadata.create_all(bind=engine_all)
+
     def main():
         print("Hello from student-manage-system!")
 
diff --git a/scores/main.py b/scores/main.py
index 20ffca5..fcc4d02 100644
--- a/scores/main.py
+++ b/scores/main.py
@@ -6,12 +6,14 @@ from scores.database import engine,Base
 Scores_API = APIRouter()
 Scores_API.include_router(score_api)
 
-# 自测接口
-app = FastAPI(tags=['成绩'],title='成绩管理系统')
-app.include_router(score_api)
 
-Base.metadata.create_all(engine)
 
 if __name__ == '__main__':
+    # 自测接口
+    app = FastAPI(tags=['成绩'], title='成绩管理系统')
+    app.include_router(score_api)
+
+    Base.metadata.create_all(engine)
+
     import uvicorn
     uvicorn.run('main:app',host='127.0.0.1',port=12346)
\ No newline at end of file
diff --git a/stu_jiuye/main.py b/stu_jiuye/main.py
index de85ae5..191dd09 100644
--- a/stu_jiuye/main.py
+++ b/stu_jiuye/main.py
@@ -11,12 +11,13 @@ Shtudent_Jiuye.include_router(CURD)
 
 
 app=FastAPI()
-Base.metadata.create_all(engine)
+
 app.include_router(CURD,tags=['就业管理系统'])
 
 
-
 if __name__=='__main__':
+    Base.metadata.create_all(engine)
+
     import uvicorn
     uvicorn.run('main:app', host='127.0.0.1', port=12395)
 
diff --git a/students/main.py b/students/main.py
index b6fd5f9..d3aa661 100644
--- a/students/main.py
+++ b/students/main.py
@@ -8,18 +8,19 @@ from contextlib import asynccontextmanager
 Students_API = APIRouter()
 Students_API.include_router(s_api)
 
-# 自测接口
-@asynccontextmanager
-async def S_Fastapi(app: FastAPI):
-    Base.metadata.create_all(engine1)
-    yield
-    engine1.dispose()
-
-app = FastAPI(title="学生管理系统",lifespan=S_Fastapi) # 这里必须把上面写的加上
-app.include_router(s_api,tags=["students"])
-
 
 if __name__ == "__main__":
+    # 自测接口
+    @asynccontextmanager
+    async def S_Fastapi(app: FastAPI):
+        Base.metadata.create_all(engine1)
+        yield
+        engine1.dispose()
+
+
+    app = FastAPI(title="学生管理系统", lifespan=S_Fastapi)  # 这里必须把上面写的加上
+    app.include_router(s_api, tags=["students"])
+
     def main():
         print("Hello from student-manage-system!")