diff --git a/src/main/resources/sql/mapper/file-mapper.xml b/src/main/resources/sql/mapper/file-mapper.xml
index 55f5dc6..55ecb7c 100644
--- a/src/main/resources/sql/mapper/file-mapper.xml
+++ b/src/main/resources/sql/mapper/file-mapper.xml
@@ -61,7 +61,7 @@ SELECT A.*, FILE_PATH URL
 <selectKey keyProperty="file.id,file.path" keyColumn="NEW_ID,PATH" resultType="map" order="BEFORE">
 SELECT NEW_ID, CONCAT(DIR, NEW_ID, '.', #{file.extension}) PATH
   FROM (
-       SELECT IFNULL(MAX(FILE_ID) + 1, CONCAT(THIS_DAY, '00001')) NEW_ID
+       SELECT NVL(MAX(FILE_ID) + 1, CONCAT(THIS_DAY, '00001')) NEW_ID
          FROM TB_FILE A, (<include refid="utility.selectThisDay" />) B
         WHERE FILE_ID LIKE CONCAT(THIS_DAY, '%')
        ) T1, (