diff --git a/src/main/java/com/project/information/mapper/KnowledgePointMapper.java b/src/main/java/com/project/information/mapper/KnowledgePointMapper.java
index 83cce17..61c50de 100644
--- a/src/main/java/com/project/information/mapper/KnowledgePointMapper.java
+++ b/src/main/java/com/project/information/mapper/KnowledgePointMapper.java
@@ -19,11 +19,12 @@ public interface KnowledgePointMapper extends BaseMapper<KnowledgePointEntity> {
      */
     @Select({
             "SELECT",
-            "  SUM(CASE WHEN p.knowledge_type = 0 THEN 1 ELSE 0 END) AS accurateGraspNum,",
-            "  SUM(CASE WHEN p.knowledge_type = 1 THEN 1 ELSE 0 END) AS vagueGraspNum",
+            "  COALESCE(SUM(CASE WHEN p.knowledge_type = 0 THEN 1 ELSE 0 END), 0) AS accurateGraspNum,",
+            "  COALESCE(SUM(CASE WHEN p.knowledge_type = 1 THEN 1 ELSE 0 END), 0) AS vagueGraspNum,",
+            "  #{subLineId} AS subLineId",
             "FROM evaluator_information e ",
-            "INNER JOIN evaluator_knowledge_point p ON p.information_id = e.id ",
-            "WHERE e.sub_line_id = #{subLineId} and p.deleted = 0 and e.deleted = 0"
+            "LEFT JOIN evaluator_knowledge_point p ON p.information_id = e.id AND p.deleted = 0",
+            "WHERE e.sub_line_id = #{subLineId} AND e.deleted = 0"
     })
     KnowledgePointStatisticsDTO selectBySubLineId(@Param("subLineId") Long subLineId);
 }