用DSN连接并且没有用户名和密码：
<%
set conn = Server.CreateObject("ADODB.Connection")
conn.open "YourDSNName"
%>
用DSN连接并且有用户名和密码：
<%
set conn = Server.CreateObject("ADODB.Connection")
conn.open "YourDSNName","username","password"
%>
用实际的数据库绝对路径连接：
<%
Set conn = Server.CreateObject("ADODB.Connection")
Strconn="DRIVER={Microsoft Access Driver (*.mdb)}; "
Strconn=Strconn & "DBQ=e:\yanhang\database.mdb"
conn.Open Strconn
%>
用实际的数据库相对路径连接：
<%
Set conn = Server.CreateObject("ADODB.Connection")
Strconn="DRIVER={Microsoft Access Driver (*.mdb)}; "
Strconn=Strconn & "DBQ=" & Server.MapPath("/database/yanhang.mdb")
conn.Open Strconn
%>
MS SQL Server数据库连接
用DSN连接：
<%
set conn = Server.CreateObject("ADODB.Connection")
conn.open "DSN=MyDSN;UID=user;PWD=password;DATABASE=databasename"
%>
不用DSN连接：
<%
Set conn = Server.CreateObject("ADODB.Connection")
DSNtemp="DRIVER={SQL Server};SERVER=ServerName;UID=USER;PWD=password;DATABASE=databasename"
conn.open DSNtemp
%>
FoxPro数据库连接
<%
Set Conn = Server.CreateObject("ADODB.connection")
ConnStr= "Driver=Microsoft Visual Foxpro Driver; UID=userID;SourceType=DBC;SourceDB=C:\yanhang\database.dbc"
Conn.Open ConnStr
%>
Oracle数据库连接：
<%
set conn=server.createobject("adodb.connection")
conn.cursorlocation=adUseClient
DSNTemp="Provider=MSDAORA.1;Password=xxxxx;User ID=yanhang;Data Source=xxx.world"
conn.open DSNtemp
%>
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