diff --git a/app/controllers/subjects_controller.rb b/app/controllers/subjects_controller.rb
index cf1330125..676af6036 100644
--- a/app/controllers/subjects_controller.rb
+++ b/app/controllers/subjects_controller.rb
@@ -467,7 +467,7 @@ class SubjectsController < ApplicationController
           @subject.subject_course_records
           select_sql = "count(*) total, sum(course_count) course_count, sum(student_count) student_count, " +
               "sum(choice_shixun_num) choice_shixun_num, sum(choice_shixun_frequency) choice_shixun_frequency"
-          @total = @subject.subject_course_records.select("select_sql").first
+          @total = @subject.subject_course_records.select("#{select_sql}").first
         end
 
     @data_count = @data.count