asp连接Mssql的方法及常见的错误

asp衔接Mssql的办法及常见的差错
//第一种写法：
MM_conn_STRING = "Driver={SQL Server};server=(local);uid=sa;pwd=;database=infs;"
Set conn = Server.Createobject("ADODB.Connection")
conn.open MM_conn_STRING
SET RS=SERVER.CreateObject("ADOBD.recordset")
SQL="SELECT * from TABLE ORDER BY ID DESC"
RS.open SQL,CONN,3,3 
//第二种写法：（DSN衔接）
MM_conn_STRING="DSN=BBS;UID=SA;PWD=12345"
Set conn = Server.Createobject("ADODB.Connection")
conn.open MM_conn_STRING
SET RS=SERVER.CreateObject("ADOBD.recordset")
SQL="SELECT * from TABLE ORDER BY ID DESC"
RS.open SQL,CONN,3,3   // 3,3是改动、删除、增添开关！
//第三种写法：
MM_conn_STRING_own = "Driver={SQL Server};server=(local);uid=sa;pwd=11111;database=infs;"
Set conn = Server.Createobject("ADODB.Connection")
conn.open MM_conn_STRING_own
//第四种 - 这种方式用在ACCESS中
strconn = "DRIVER=Microsoft Access Driver (*.mdb);DBQ=" _
& Server.MapPath("asp.mdb")
set conn = server.createobject("adodb.connection")
conn.open strconn
实现方式一:
<%
dim conn
set conn=server.createobject("ADODB.connection")
conn.open "PROVIDER=SQLOLEDB;DATA SOURCE=(local);UID=用户名;PWD=密码;DATABASE=数据库"
Set conn = Server.CreateObject("ADODB.Connection")
DSNtemp="DRIVER={SQL Server};SERVER=(local);UID=用户名;PWD=密码;DATABASE=数据库"
conn.open DSNtemp
%>
实现方式二:
<%
option explicit
dim startime
dim conn
dim connstr
dim db,pass_word,User_ID,Data_Source
startime=timer()
db="数据库名称"
Pass_word="帐号密码"  
User_ID="登陆帐号"    
Data_Source="服务名称或者ip"  
Set conn = Server.CreateObject("ADODB.Connection")
connStr="Provider=SQLOLEDB.1;Password='"&pass_word&"';Persist Security Info=True;User ID='"&User_ID&"';Initial Catalog='"&db&"';Data Source='"&Data_Source&"'"
conn.Open connstr
function CloseDb
Conn.close
Set conn = Nothing
End Function
常见故障
(a)
Microsoft OLE DB Provider for ODBC Drive