fix

zhongzheng-system/src/main/resources/mapper/modules/grade/ClassGradeMapper.xml

@@ -633,7 +633,6 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         cgu.tenant_id as org_id,
         cb.business_name,
         cpt.project_name,
-        (SELECT IFNULL(SUM(usr.study_duration),0) from user_study_record usr where usr.user_id = cgu.user_id and usr.grade_id = cgu.grade_id) as user_study_duration,
         (SELECT count(*) from class_grade_user cgu where cgu.order_goods_id = og.order_goods_id) as use_study_count,
         ueg.exam_number,
         ueg.do_number,