两个模块写好

dao/statistics.py

@@ -0,0 +1,30 @@
+from DoubaoTeam.schemas.statistics import NoExist
+from sqlalchemy import func
+
+#`GET /statistics/students/age-over-30`
+#查询所有超过 30 岁的学员信息
+
+def age_over_thirty(Student,db):
+    student_list=db.query(Student).filter(Student.age>=30).all()
+    if not student_list :
+        raise NoExist('无目标年龄大于30岁')
+    return student_list
+
+def gender_count(Student,db):
+    result=db.query(Student.class_id,Student.gender,func.count(Student.id)).group_by(Student.class_id,Student.gender).all()
+    if not result :
+        raise NoExist('班里招点人吧，要倒闭了')
+    dict1 = {}
+    for i,j,k in result:
+        if i not in dict1 :
+            dict1[i]={'男':0,'女':0}
+        dict[i][j]+=k
+    return dict1
+#查询每次考试成绩都在 80 分以上的学生编号、姓名和成绩
+def score_over_eighty(Score,Student,db):
+    student_list=db.query(Student.id, Student.student_name)\
+                  .join(Student,Score.student_id==Student.id).group_by(Student.student_no,Student.student_name)\
+                  .having(func.min(Score.score)>80).all()
+    for i in student_list:
+        student_list2 = db.query(Student.student_no, Student.student_name,Score.score).join(Student,Score.student_id==Student.id).filter(i.id==Student.id).all()
+