附件作业统计+导出

web/src/main/resources/sql/jlw/questionLogSummary.md

@@ -950,9 +950,9 @@ homeworkFileAnalysisPageQuery
   ta.teacher_open_course_question_start_time AS start_time,
   ta.teacher_open_course_question_end_time AS end_time,
   ta.teacher_open_course_question_setting_type AS question_setting_type,
-  round( avg( question_log_summary_student_total_score ), 1 ) AS avg_student_score,
-  round( avg( question_log_summary_success_rate ), 1 ) AS avg_question_log_summary_success_rate,
-  round( avg( question_log_summary_is_pass ), 1 ) AS avg_question_log_summary_is_pass
+  IFNULL(round( avg( question_log_summary_student_total_score ), 1 ), 0) AS avg_student_score,
+  IFNULL(round( avg( question_log_summary_success_rate ), 1 ), 0) AS avg_question_log_summary_success_rate,
+  IFNULL(round( avg( question_log_summary_is_pass ), 1 ), 0) AS avg_question_log_summary_is_pass
   FROM
   teacher_open_course_question_setting ta
   LEFT JOIN question_log_summary t ON t.question_setting_id = ta.teacher_open_course_question_setting_id