diff --git a/dms-dormitory/src/main/resources/mapper/dormitory/DmsDormitoryMapper.xml b/dms-dormitory/src/main/resources/mapper/dormitory/DmsDormitoryMapper.xml
index 1d1227b..277d5ab 100644
--- a/dms-dormitory/src/main/resources/mapper/dormitory/DmsDormitoryMapper.xml
+++ b/dms-dormitory/src/main/resources/mapper/dormitory/DmsDormitoryMapper.xml
@@ -616,13 +616,13 @@
     </select>
 
     <select id="listViewDormInfoByIds" parameterType="List" resultType="DmsDormitory">
-        select a.*,
-        case b.occupancy
-        when b.occupancy is not null then b.occupancy
-        else 0
-        end
-        as occupancy from view_dorm_info as a
-        left join view_dorm_stu_count as b on a.id = b.dormitory_id
+        SELECT a.*,
+        CASE
+        WHEN b.occupancy IS NOT NULL THEN b.occupancy
+        ELSE 0
+        END AS occupancy
+        FROM view_dorm_info AS a
+        LEFT JOIN view_dorm_stu_count AS b ON a.id = b.dormitory_id
         where a.id in
         <foreach item="item" collection="ids" open="(" separator="," close=")">
             #{item}