diff --git a/dl-module-jx/src/main/resources/mapper/base/DlDriveSchoolCoachMapper.xml b/dl-module-jx/src/main/resources/mapper/base/DlDriveSchoolCoachMapper.xml
index 816c779e..7b02dbe8 100644
--- a/dl-module-jx/src/main/resources/mapper/base/DlDriveSchoolCoachMapper.xml
+++ b/dl-module-jx/src/main/resources/mapper/base/DlDriveSchoolCoachMapper.xml
@@ -56,7 +56,7 @@
         order by studentTotalNum desc
     </select>
 
-    <select id="getCoachByUniqueCode" parameterType="String" resultType="cn.iocoder.yudao.module.base.entity.DlDriveSchoolCoach">
+    <select id="getCoachByUniqueCode" parameterType="string" resultType="cn.iocoder.yudao.module.base.entity.DlDriveSchoolCoach">
         SELECT dsc.* FROM company_staff cs
         LEFT JOIN drive_school_coach dsc ON cs.user_id = dsc.user_id
         WHERE cs.unique_code = #{uniqueCode}  AND dsc.DELETED = 0
diff --git a/dl-module-jx/src/main/resources/mapper/course/SchoolCourseOrderMapper.xml b/dl-module-jx/src/main/resources/mapper/course/SchoolCourseOrderMapper.xml
index 3fd4db68..fb745f44 100644
--- a/dl-module-jx/src/main/resources/mapper/course/SchoolCourseOrderMapper.xml
+++ b/dl-module-jx/src/main/resources/mapper/course/SchoolCourseOrderMapper.xml
@@ -56,7 +56,7 @@
                         AND main.discount &gt; 0
                     </when>
                     <when test="entity.discountIndex == 0">
-                        AND main.discount = 0 or main.discount is null
+                        AND (main.discount = 0 or main.discount IS NULL)
                     </when>
                 </choose>
             </if>