diff --git a/PythonProject/api/employment_api.py b/PythonProject/api/employment_api.py
index 2a09422..785aa3c 100644
--- a/PythonProject/api/employment_api.py
+++ b/PythonProject/api/employment_api.py
@@ -27,6 +27,8 @@ def get_emp_info3(stu_id:int = Path(description='学生编号')
                                , company_name=company_name
                                , min_salary=min_salary
                                , max_salary=max_salary)
+    if not l1:
+        raise HTTPException(status_code=404,detail='该学生就业信息不存在！')
     return l1
 
 @emp_api.post('/employment/students/{stu_id}',response_model=EmploymentResponse,summary='新增学生就业信息')
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/employment_dao.py b/PythonProject/dao/employment_dao.py
index 2a7e1fc..9e0f8b7 100644
--- a/PythonProject/dao/employment_dao.py
+++ b/PythonProject/dao/employment_dao.py
@@ -31,12 +31,9 @@ def get_emp_dao(db,stu_id=None,class_id=None,company_name=None,min_salary=None,m
         q = q.filter(Employment_info.salary <= max_salary)
 
     r = q.all()
-    if not r:
-        raise HTTPException(status_code=500,detail='查询异常，没有结果！')
     return r
 
 
-
 def add_emp_dao(o,db):
     try:
         stu = db.query(Student_Model).filter(Student_Model.stu_id == o['stu_id']
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..5408a44 100644
--- a/PythonProject/model/all_model.py
+++ b/PythonProject/model/all_model.py
@@ -60,19 +60,19 @@ class ClassManagement(Base):
 
     class_name = Column(String(100), comment='班级名字')
 
-    start_class_date = Column(DATE,comment='开课时间')
+    start_class_date = Column(Date,default=date.today,comment='开课时间')
 
     head_teacher_id= Column(Integer,ForeignKey('wl_teacher.teac_id'),comment='班主任')
 
     class_teacher_id = Column(Integer,ForeignKey('wl_teacher.teac_id'),comment='授课教师')
 
-    Entry_date= Column(Date,default=date.today,comment='录入时间')
+    Entry_date= Column(DATETIME,default=datetime.now,comment='录入时间')
 
     update_date = Column(DATETIME,default=datetime.now,onupdate=datetime.now,comment='更新时间')
 
     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'