diff --git a/lib/tasks/statistic_subject_info.rake b/lib/tasks/statistic_subject_info.rake
index 7eed62b3c..e7be4de15 100644
--- a/lib/tasks/statistic_subject_info.rake
+++ b/lib/tasks/statistic_subject_info.rake
@@ -44,6 +44,9 @@ namespace :subjects do
     puts("---------------------course_info_statistic_begin")
     Rails.logger.info("---------------------course_info_statistic_begin")
     subjects = Subject.where(status: 2)
+    str = ""
+    column_value = "subject_id, school_id, school_name, course_count, student_count, choice_shixun_num, " +
+        "choice_shixun_frequency, created_at, updated_at"
     subjects.find_each do |subject|
       puts("---------------------course_info_statistic: #{subject.id}")
       Rails.logger.info("---------------------course_info_statistic: #{subject.id}")