ASPÅжϵÄÎÊÌâ,ÓôÃÆÁË!Åжϲ»³öÀ´!

HTML code:

dim jf
set conn=server.createobject("adodb.connection")
connstr="Driver={Sql Server};Server="&Sqlip&";Database="&Sqldb&";Uid="&SqlUid&";Pwd="&SqlPwd&";"
conn.Open connstr
Set RS=Conn.Execute("SELECT sum(cs) as ok from aaa WHERE (bbb='abc')")
jf=rs("ok")
if jf="" then
response.write"<script>alert('ÄãûÓзÖÊý!');history.go(-1);</Script>"
response.end
End If



µ±¼Ç¼Àïabc²»´æÔÚʱ
ºÍÓ¦¸ÃÊǿյİ¡!
ÎÒÕâ¸öÔõôÅжϲ»³öÀ´°¡!

---

if jf=null then

---

ÊÔ¹ýÁË!²»ÐÐ!

---

if jf=0 then

---

if jf=0 then ?
if isnull(jf) then ?
if isempty(jf) then ?

---

if isnull(jf)  then


ÊÔÊÔ

---

ÏÈ trim ºóÔÙÅжϡ£

---

sum(cs)
³öÀ´µÄÊÇ0²»ÊÇnull

if jf="" then
¸ÄΪ
if jf=o then

---

if IsNull(jf) then