update

mec-biz/src/main/resources/config/mybatis/StudentAttendanceMapper.xml

@@ -542,7 +542,7 @@
     </select>
     <sql id="exportStudentAttendancesQueryPageSql">
         <where>
-            <if test="organId != null">
+            <if test="organId != null and organId != ''">
                 AND FIND_IN_SET(cs.organ_id_,#{organId})
             </if>
             <if test="groupType != null">