diff --git a/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java b/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java
index 13f1b14..6ebc20f 100644
--- a/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java
+++ b/src/main/java/com/dsideal/FengHuang/Exam/Model/ExamModel.java
@@ -247,7 +247,8 @@ public class ExamModel {
      * 功能：查看自己答卷的整体情况,哪个题目答了，哪个题目没有答
      */
     public List<Record> getPersonAllInfo(String person_id) {
-        String sql = "select *,COALESCE(reply,'0') as flag from t_exam_record where person_id=? order by order_id";
+        //如果是空值，返回0，否则返回1
+        String sql = "select *,if(reply is null,0,1) as flag from t_exam_record where person_id=? order by order_id";
         return Db.find(sql, person_id);
     }