熱銷產品統計程序

???
update bookinfo set IsHot=0

go
select top 5 BookID,sum(Num) '本數' into aa
from BuyInfo
group by BookID
order by sum(Num) DESC
go
update BookInfo
set IsHot=1
where BookID in
(
? select BookID
from aa
)
;

?

?

function Button1_onclick() {
?????? SqlConnection myConn = dbObj.GetConnection();
?????? String sql="select top 5 BookID,sum(Num) '本數' into aa? from BuyInfo";
?????? SqlCommand comm=new SqlCommand(sql,myConn);
?????? comm.ExecuteScalar();
??????? String sql1="update BookInfo set IsHot='1' where BookID in( select BookID from aa)";
?????? SqlCommand comm=new SqlCommand(sql1,myConn);
?????? comm.ExecutenNonQuery();
?????? myConn.close();
?????? }

總結

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