diff --git a/src/main/resources/mapper/change/ChangeManagementMapper.xml b/src/main/resources/mapper/change/ChangeManagementMapper.xml
index 3306d847..75ee76c9 100644
--- a/src/main/resources/mapper/change/ChangeManagementMapper.xml
+++ b/src/main/resources/mapper/change/ChangeManagementMapper.xml
@@ -21,11 +21,11 @@
         a.ECN_address,
         b.test_part_no
         FROM plm_technical_specification_sheet a
-        left join view_Project_final_Part b on a.site = b.site and a.project_id = b.project_id and a.test_part_no = b.test_part_no
         LEFT JOIN plm_project_info c ON a.site = c.site AND a.project_id = c.project_id
         LEFT JOIN plm_customer_information j ON j.site = c.site and j.customer_no = c.customer_id
+        left join view_Project_final_Part b on a.site = b.site and a.project_id = b.project_id and a.test_part_no = b.test_part_no
         <where>
-            a.site = #{query.site} AND (a.ECN_flag is null or a.ECN_flag = 'N') and a.status = '已完成'
+            a.site = #{query.site} AND isnull(a.ECN_flag, 'N') = 'N' and a.status = '已完成'
             <if test = "query.buNo != null and query.buNo != ''">
                 AND b.bu_no = #{query.buNo}
             </if>