diff --git a/PythonProject/api/statistics_api.py b/PythonProject/api/statistics_api.py
index c5f0032..a5f2867 100644
--- a/PythonProject/api/statistics_api.py
+++ b/PythonProject/api/statistics_api.py
@@ -44,4 +44,4 @@ def get_emp(db=Depends(get_db)):
 @StatisticsAPI.get('/salaries',summary='统计薪资分布')
 def get_salaries(db=Depends(get_db)):
     s=classify_salary(db)
-    return s
\ No newline at end of file
+    return s
diff --git a/PythonProject/dao/statistics_dao.py b/PythonProject/dao/statistics_dao.py
index edcc645..fd8251d 100644
--- a/PythonProject/dao/statistics_dao.py
+++ b/PythonProject/dao/statistics_dao.py
@@ -23,16 +23,22 @@ def select_all(db):
     try:
         l1 = db.query(Student_Model.class_id,Student_Model.gender,func.count(1).label('cnt'))\
             .group_by(Student_Model.class_id,Student_Model.gender).all()
-        all_cnt = sum(i.cnt for i in l1)
+
+        d1 = {}
+        for i in l1:
+            if i.class_id not in d1:
+                d1[i.class_id] = 0
+            d1[i.class_id] += i.cnt
 
         l2 = []
         for i in l1:
             l2.append({
-                "all_cnt": all_cnt,
+                "all_cnt": d1[i.class_id],
                 "class_id": i.class_id,
                 "gender": i.gender,
                 "cnt": i.cnt
             })
+
         return l2
     except Exception:
         raise HTTPException(status_code=500,detail="查询异常")
@@ -69,11 +75,11 @@ def select_score(min_score,max_score,db):
 # 实现统计每次考试每个班级的平均分并排序的功能
 def select_avg_score(db):
     try:
-        l1 = db.query(Student_Model.class_id,func.avg(WlScore.score).label('avg_score'))\
+        l1 = db.query(Student_Model.class_id,func.round(func.avg(WlScore.score),1).label('avg_score'))\
             .join(Student_Model,WlScore.stu_id == Student_Model.stu_id)\
             .filter(WlScore.delete_status==0,Student_Model.delete_status == 0)\
             .group_by(Student_Model.class_id)\
-            .order_by(func.avg(WlScore.score)).all()
+            .order_by(func.round(func.avg(WlScore.score),1)).all()
         return l1
     except Exception:
         raise HTTPException(status_code=500,detail="查询异常")
diff --git a/PythonProject/model/all_model.py b/PythonProject/model/all_model.py
index 55a9790..8834864 100644
--- a/PythonProject/model/all_model.py
+++ b/PythonProject/model/all_model.py
@@ -72,7 +72,7 @@ class ClassManagement(Base):
 
     delete_status = Column(Integer,default=0,comment='删除状态：0未删除，1已删除')
 
-    delete_time = Column(DATETIME,default=datetime.now,onupdate=datetime.now,comment='删除时间')
+    delete_time = Column(DATETIME,comment='删除时间')
 
 class Teacher_Model(Base):
     __tablename__ = 'wl_teacher'
@@ -149,7 +149,7 @@ class Employment_info(Base):
     delete_status = Column(
         Integer,default=0,comment='删除状态：0未删除，1已删除')
 
-    delete_time = Column(DATETIME,default=None,comment='删除时间')
+    delete_time = Column(DATETIME,comment='删除时间')
 
 class WlScore(Base):
     __tablename__ = 'wl_score'