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create trigger tri4 on sc after insert as
if exists(select * from sc join course c on sc.cno = c.cno where sno in (select sno from inserted) group by sno,semester having count(*) > 6 ) rollback 3£® ´´½¨Âú×ãÏÂÊöÒªÇóµÄÓα꣬²¢²é¿´ÓαêµÄÖ´Ðнá¹û¡£ £¨1£© ÁгöVB¿¼ÊԳɼ¨×î¸ßµÄǰ2ÃûºÍ×îºó1ÃûѧÉúµÄѧºÅ¡¢ÐÕÃû¡¢ËùÔÚϵºÍVB³É¼¨¡£
declare @sno char(10),@sname char(10),@dept char(14),@grade char(4) declare c1 SCROLL cursor for select s.sno,sname,sdept,grade
from student s join sc on s.sno = sc.sno join course c on c.cno = sc.cno where cname = 'vb' order by grade desc open c1
print ' ѧºÅ ÐÕÃû ËùÔÚϵ VB³É¼¨'
print '---------------------------------------' fetch next from c1 into @sno ,@sname ,@dept ,@grade if @@FETCH_STATUS = 0
print @sno + @sname + @dept + @grade
fetch next from c1 into @sno ,@sname ,@dept ,@grade if @@FETCH_STATUS = 0
print @sno + @sname + @dept + @grade
fetch last from c1 into @sno ,@sname ,@dept ,@grade if @@FETCH_STATUS = 0
print @sno + @sname + @dept + @grade close c1 deallocate c1
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declare @sname char(10),@age char(4),@dept char(20) declare c1 cursor for select distinct sdept from student open c1
fetch next from c1 into @dept while @@FETCH_STATUS = 0 begin
print @dept
declare c2 cursor for
select top 2 with ties sname,sage from student where sdept = @dept order by sage desc open c2
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¡¤42¡¤ fetch next from c2 into @sname ,@age if @@FETCH_STATUS = 0 print @sname + @age fetch next from c2 into @sname ,@age if @@FETCH_STATUS = 0 print @sname + @age print '' close c2 deallocate c2
fetch next from c1 into @dept end close c1 deallocate c1
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