feat:教务端学员云教练数据统计

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

@@ -786,7 +786,7 @@
         SELECT COUNT(user_id_)
         FROM (SELECT
             smcr.user_id_,
-            COUNT(DISTINCT(CASE WHEN DATEDIFF(NOW(), smcr.create_time_)<=30 THEN DATE_FORMAT(smcr.create_time_, '%Y-%m-%d') ELSE NULL END)) days
+            COUNT(DISTINCT(CASE WHEN DATEDIFF(NOW(), smcr.create_time_)<=15 THEN DATE_FORMAT(smcr.create_time_, '%Y-%m-%d') ELSE NULL END)) days
             FROM sys_music_compare_record smcr
             LEFT JOIN sys_user su ON smcr.user_id_=su.id_
             LEFT JOIN student stu ON smcr.user_id_=stu.user_id_