Created
December 24, 2014 16:28
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de-6
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create database de6 | |
use de6 | |
alter table mon add | |
constraint cheack_e cheack (sotinchi between 1 and 4) | |
create trigger temp | |
on sinhvien | |
for insert,update | |
as | |
begin | |
declare | |
@namsinh smalldatetime | |
@namhoc smalldatetime | |
select @namhoc=namhoc | |
from inserted a join dangky b | |
on a.masv=b.masv | |
if(@namsinh >@namhoc) | |
begin | |
print 'Nam hoc dang ky phai lon hon nam sinh' | |
rollback trancation | |
end | |
end | |
create trigger temp | |
on namhoc | |
for insert,update | |
--Liệt kê danh sách các sinh viên (Masv, Hoten) học chuyên ngành ‘He thong thong tin’ | |
select masv,hoten | |
from sinhvien a join chuyennganh b | |
on a.macn=b.macn | |
where tencn='He thong' | |
--Liệt kê những sinh viên (Masv, Hoten) thuộc chuyện ngành “He thong thong tin” chưa đăng | |
--ký học môn ‘PTTKHTTT’ | |
select masv,hoten | |
from sinhvien a join chuyennganh b | |
on a.macn=b.macn | |
where tencn='He thong' and macn not in(select macn | |
from chuyennganh | |
where macn = pttkhtt') | |
--Tìm những sinh viên (Masv, Hoten) đã đăng ký tất cả các môn thuộc chuyên ngành ‘He thong | |
--thong tin’ | |
select macn,hoten | |
from sinhvien |
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