diff --git a/dal/db_query/queries.sql b/dal/db_query/queries.sql
index a59936c..9e9ee56 100644
--- a/dal/db_query/queries.sql
+++ b/dal/db_query/queries.sql
@@ -522,7 +522,7 @@ WITH Funnel AS (
 ),
      Results AS (
     SELECT
-        q.title AS question_title,
+        COALESCE(q.title, '') AS question_title,
         COUNT(*) AS total_answers,
         CAST(COUNT(*) * 100.0 / NULLIF(SUM(COUNT(*)) FILTER (WHERE a.result = TRUE) OVER (PARTITION BY a.quiz_id), 0) AS FLOAT8) AS percentage
     FROM
@@ -587,18 +587,16 @@ SELECT
     Funnel.count_start_true,
     Funnel.count_f_result_with_t_question,
     Funnel.count_t_result,
-    Results.question_title AS results_title,
-    Results.percentage AS results_percentage,
-    Questions.question_title AS questions_title,
+    COALESCE(Results.question_title, '') AS results_title,
+    COALESCE(Results.percentage, 0) AS results_percentage,
+    COALESCE(Questions.question_title, '') AS questions_title,
     COALESCE(Questions.question_page, 0) AS questions_page,
-    Questions.answer_content AS answer_content,
-    Questions.percentage AS questions_percentage
+    COALESCE(Questions.answer_content, '') AS answer_content,
+    COALESCE(Questions.percentage, 0) AS questions_percentage
 FROM
-    Funnel,
-    Results,
-    Questions
-WHERE
-    Questions.percentage >= 1;
+    Funnel
+    LEFT JOIN Results ON true
+    LEFT JOIN Questions ON Questions.percentage >= 1;
 
 -- name: QuizCopyQid :one
          INSERT INTO quiz (