Updating A Field In A Record

I try to execute the following:

Dim rsCars,mySQL,CAR_ID1,CAR_NAME
set rsCars=Server.CreateObject("ADODB.Recordset")
mySQL="select * from CAR WHERE (ENDING_DATE < Now() AND MAIL_SENT=0) AND CAR_STATUS=0;"
'mySQL="Update CAR SET MAIL_SENT=1 WHERE (ENDING_DATE < Now() AND MAIL_SENT=0) AND CAR_STATUS=0;"
rsCars.CursorType = 2
rsCars.LockType = 3
rsCars.Open mySQL,objConn

'set rsCars = objConn.Execute(mySQL)

But, it doesn't work both ways , and gives the following error:

Microsoft OLE DB Provider for ODBC Drivers (0x80040E10)
[Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 1.