修改提出的问题和新需求

ruoyi-dw/src/main/resources/mapper/dw/DwIndexConfigMapper.xml

@@ -118,7 +118,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                 END AS city,
             COUNT(*) AS student_count
         FROM cj_student
-        where sfqr = 1
+        where sfqr = 1 and sydsh is not null
           and cast(bynf as unsigned)
             between  YEAR(CURRENT_DATE) - #{year} + 1 and YEAR(CURRENT_DATE)
         GROUP BY