修改bug

src/main/resources/mapper/business/pclessonbrowse/mapper/PcLessonBrowseMapper.xml

@@ -48,6 +48,7 @@
         <if test="entity.userId !=null and entity.userId != '' ">
             and plb.user_id = #{entity.userId}
         </if>
+        group BY plb.lesson_id
         ORDER BY plb.business_id DESC
     </select>