update Student set Adress='山东省济南市文化路1号院'
where StudentNo='S1201302004'
update Student set GradeId=2
where StudentNo='S1201302005'
update Student set Adress='未知@'
where Adress=null
update Subject set ClassHour=55
where SubjectName='走进JAVA编程世界'
***update Result and Subject set StudentResult=StudentResult+5
where ExamDate='2013-10-18'and StudentResult <60
SubjectName='走进JAVA编程世界'
update Result,Subject set StudentResult=55
where StudentNo='S1201302002' and ExamDate='2013-10-18'and SubjectName='HTML和CSS网页技术'
从***那里开始出错