diff --git a/web/src/main/resources/sql/jlw/student.md b/web/src/main/resources/sql/jlw/student.md
index 3914aff6..bb33bffa 100644
--- a/web/src/main/resources/sql/jlw/student.md
+++ b/web/src/main/resources/sql/jlw/student.md
@@ -2163,8 +2163,9 @@ getStudentInfoByClassId
     JOIN school_class ON student.class_id = school_class.class_id
     JOIN universities_colleges on school_class.universities_colleges_id = universities_colleges.universities_colleges_id
     JOIN university_system us on school_class.university_system_id = us.university_system_id     
-WHERE
-    student.class_id IN (#classIds#)
+    WHERE
+    1=1 and
+    find_in_set(student.class_id ,#classIds#)
 
 
 getStudentInfoByKeyword