diff --git a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudySignupServiceImpl.java b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudySignupServiceImpl.java
index 9288ca4c..a10ee6b9 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudySignupServiceImpl.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudySignupServiceImpl.java
@@ -79,7 +79,7 @@ public class StudySignupServiceImpl implements IStudySignupService{
 		signupDao.save(signup);
 		//添加到课程学习
 		LocalDateTime now=LocalDateTime.now();
-		String sql="SELECT c.id,,c.content_name,,c.course_id from boe_course_content c " +
+		String sql="SELECT c.id,c.content_name,c.course_id from boe_course_content c " +
 				"where c.course_id = '"+signup.getCourseId()+"'";
 		List<CourseContent> courseContents =  contentDao.sqlFindList(sql);
 		StudyCourse sc=new StudyCourse();