ADO数据库连接语句

数据库连接查询手册
下面将简单介绍一下几种ADO连接方式：ODBC DSN,ODBC DSN-Less,

OLE DB Provider 和 MS Remote Provider

I.DSN

oConn.Open “DSN=AdvWorks;” & _
“UID=Admin;” & _
“PWD=;”
注意：从MDAC2.1开始就不能够在使用这样的方式了，就是只把DSN文件名放在ConnectString中
你必须同时使用DSN，UID，PWD标志。例如下面的方式在MDAC 2.1中将会出错：
oConn.Open “AdvWorks”

II.File DSN

oConn.Open “FILEDSN=/somepath/mydb.dsn;” & _
“UID=Admin;” & _
“PWD=;”

III.ODBC DSN-Less Connections

a)ODBC Text Driver

oConn.Open _
“Driver={Microsoft Text Driver (*.txt; *.csv)};” & _
“Dbq=/somepath/;” & _
“Extensions=asc,csv,tab,txt;” & _
“Persist Security Info=False”
注意：需要在SQL语句中指定使用到的文件名。例如：
oRs.Open “Select * From customer.csv”, _
oConn, adOpenStatic, adLockReadOnly, adCmdText

b)ODBC Driver for Access

i)普通安全模式：
oConn.Open _
“Driver={Microsoft Access Driver (*.mdb)};” & _
“Dbq=/somepath/mydb.mdb;” & _
“Uid=Admin;” & _
“Pwd=;”

ii)如果使用了System database:
oConn.Open _
“Driver={Microsoft Access Driver (*.mdb)};” & _
“Dbq=/somepath/mydb.mdb;” & _
“SystemDB=/somepath/mydb.mdw;”, _
“admin”, “”

c)ODBC Driver for SQL Server

i)普通安全模式
oConn.Open “Driver={SQL Server};” & _
“Server=carl2;” & _
“Database=pubs;” & _
“Uid=sa;” & _
“Pwd=;”

ii)使用信任安全模式：
oConn.Open “Driver={SQL Server};” & _
“Server=carl2;” & _
“Database=pubs;” & _
“Uid=;” & _
“Pwd=;”
注意：要使用空白的Uid和Pwd

d)ODBC Driver for Oracle

i)使用现有的Oracle ODBC Driver from Microsoft:
oConn.Open _
“Driver={Microsoft ODBC for Oracle};” & _
“Server=OracleServer.world;” & _
“Uid=demo;” & _
“Pwd=demo;”

ii)使用老版本的Oracle ODBC Driver from Microsoft:
oConn.Open _
“Driver={Microsoft ODBC Driver for Oracle};” & _
“ConnectString=OracleServer.world;” & _
“Uid=demo;” & _
“Pwd=demo;”

IV.使用微软的OLE DB Data Link Connections方式Data Link File (UDL)

a)使用绝对路径
oConn.Open “File Name=/somepath/pubs.udl;”

b)使用相对路径
oConn.Open “File Name=pubs.udl;”

V.OLE DB Provider Connections方式

a)OLE DB Provider for ODBC Databases

i)Access (Jet):
oConn.Open _
“Provider=MSDASQL;” & _
“Driver={Microsoft Access Driver (*.mdb)};” & _
“Dbq=/somepath/mydb.mdb;” & _
“Uid=Admin;” & _
“Pwd=;”

ii)SQL Server:
oConn.Open _
“Provider=MSDASQL;” & _
“Driver={SQL Server};” & _
“Server=carl2;” & _
“Database=pubs;” & _
“Uid=sa;” & _
“Pwd=;”

b)OLE DB Provider for Microsoft Jet (Access)

i)普通安全模式：
oConn.Open _
“Provider=Microsoft.Jet.OLEDB.4.0;” & _
“Data Source=/somepath/mydb.mdb;” & _
“User Id=admin;” & _
“Password=;”

ii)如果使用了System database:
oConn.Open _
“Provider=Microsoft.Jet.OLEDB.4.0;” & _
“Data Source=/somepath/mydb.mdb;” & _
“Jet OLEDB:System Database=system.mdw;”, _
“admin”, “”
注意：当使用OLE DB Provider4.0版本是，需要把MDB和MDW文件转换成4.0的数据库格式

iii)如果MDB需要一个数据库密码的话：
oConn.Open _
“Provider=Microsoft.Jet.OLEDB.4.0;” & _
“Data Source=/somepath/mydb.mdb;” & _
“Jet OLEDB:Database Password=MyDbPassword;”, _
“admin”, “”

c)OLE DB Provider for Excel Spreadsheet:

oConn.Open _
“Provider=Microsoft.Jet.OLEDB.4.0;” & _
“Data Source=/somepath/expenses.xls;” & _
“Extended Properties=”"Excel 8.0;HDR=Yes;”";”
注意： “HDR=Yes”表示在第一行中是行标题，在provider中将不把第一行包括入recordset中

d)OLE DB Provider for SQL Server

i)普通安全模式：
oConn.Open “Provider=sqloledb;” & _
“Network Library=DBMSSOCN;” & _
“Data Source=carl2;” & _
“Initial Catalog=pubs;” & _
“User Id=sa;” & _
“Password=;”

ii)使用信任安全模式：
oConn.Open “Provider=sqloledb;” & _
Network Library=DBMSSOCN;” & _
“Data Source=carl2;” & _
“Initial Catalog=pubs;” & _
“Trusted_Connection=yes;”
注意：”Network Library=DBMSSOCN”声明OLE DB使用TCP/IP替代Named Pipes.

e)OLE DB Provider for Oracle

oConn.Open “Provider=msdaora;” & _
“Data Source=OracleServer.world;” & _
“User Id=sa;” & _
“Password=;”

VI.Remote OLE DB Provider Connections方式

a)MS Remote – Access (Jet)

i)ODBC DSN:
oConn.Open “Remote Server=http://carl2;” & _
“Remote Provider=MSDASQL;” & _
“DSN=AdvWorks;” & _
“Uid=admin” & _
“Pwd=;”

ii)OLE DB Provider:
oConn.Open “Provider=MS Remote;” & _
“Remote Server=http://carl2;” & _
“Remote Provider=Microsoft.Jet.OLEDB.4.0;” & _
“Data Source=/somepath/mydb.mdb;”, _
“admin”, “”

iii)OLE DB Provider自定义事务对象
oConn.Open “Provider=MS Remote;” & _
“Remote Server=http://carl2;” & _
“Handler=MSDFMAP.Handler;” & _
“Data Source=MyAdvworksOLEDBConnectTag;”

b)MS Remote – SQL Server

i)ODBC DSN:
oConn.Open “Remote Server=http://carl2;” & _
“Remote Provider=MSDASQL;” & _
“Network Library=DBMSSOCN;” & _
“DSN=Pubs;” & _
“Uid=sa” & _
“Pwd=;”

ii)OLE DB Provider
oConn.Open “Provider=MS Remote;” & _
“Remote Server=http://carl2;” & _
“Remote Provider=SQLOLEDB;” & _
“Network Library=DBMSSOCN;” & _
“Data Source=carl2;” & _
“Initial Catalog=pubs;” & _
“User ID=sa;” & _
“Password=;”

原文出处：http://flickr.ixiezi.com/2011/05/11/ado%E6%95%B0%E6%8D%AE%E5%BA%93%E8%BF%9E%E6%8E%A5%E8%AF%AD%E5%8F%A5/