diff --git a/dal/db_query/queries.sql b/dal/db_query/queries.sql
index f0a49e5..956c561 100644
--- a/dal/db_query/queries.sql
+++ b/dal/db_query/queries.sql
@@ -521,7 +521,7 @@ WITH Funnel AS (
             SELECT DISTINCT a.session, q.id AS qid_true_result
             FROM answer a
                      JOIN question q ON a.question_id = q.id
-            WHERE a.result = TRUE
+            WHERE a.result = TRUE AND a.quiz_id = $1
         ) AS q ON a.session = q.session
     WHERE
         a.quiz_id = $1
@@ -1082,4 +1082,4 @@ UPDATE tgAccounts SET Status = $1 WHERE id = $2;
 UPDATE tgAccounts SET Deleted = true WHERE id = $1;
 
 -- name: SearchIDByAppIDanAppHash :one
-SELECT * FROM tgAccounts WHERE ApiID = $1 and ApiHash=$2 and Deleted = false;
\ No newline at end of file
+SELECT * FROM tgAccounts WHERE ApiID = $1 and ApiHash=$2 and Deleted = false;
diff --git a/dal/schema/000020_init.down.sql b/dal/schema/000020_init.down.sql
new file mode 100644
index 0000000..2944567
--- /dev/null
+++ b/dal/schema/000020_init.down.sql
@@ -0,0 +1 @@
+DROP INDEX results_for_quiz;
diff --git a/dal/schema/000020_init.up.sql b/dal/schema/000020_init.up.sql
new file mode 100644
index 0000000..b9b9817
--- /dev/null
+++ b/dal/schema/000020_init.up.sql
@@ -0,0 +1 @@
+CREATE INDEX IF NOT EXISTS results_for_quiz ON answer(quiz_id, result);
diff --git a/dal/sqlcgen/queries.sql.go b/dal/sqlcgen/queries.sql.go
index 1cbf320..c55c3f3 100644
--- a/dal/sqlcgen/queries.sql.go
+++ b/dal/sqlcgen/queries.sql.go
@@ -3306,7 +3306,7 @@ WITH Funnel AS (
             SELECT DISTINCT a.session, q.id AS qid_true_result
             FROM answer a
                      JOIN question q ON a.question_id = q.id
-            WHERE a.result = TRUE
+            WHERE a.result = TRUE AND a.quiz_id = $1
         ) AS q ON a.session = q.session
     WHERE
         a.quiz_id = $1