1. Connection string has to be changed 2. in SQLServer, if you use stored procedure to return a resulset, Then that part you have to re write that stored procedure inside of Packages and in ASP you have to call differently! 3. If you have any caliculations in ASP with Number fields in Oralce, then in-order to do caliculations you have to convert them using cint or cdouble, then only ASP can able to do caliculations! [This you have to do if you use MSDAORA to connect to oracle DB] 4. If you have multiple text fieldes in a table in SQLSErver, then you have to BLOB in Oracle, But Blob is not supported with MSDAORA, for that you have to use oracle dirver to access the related pages which needs/uses blob. There is an other way is, Oracle LONG is also equalent to text of sqlserver. But you can use only one long field in a table. That's a limitation in oracle. If you use LONG, then you can still use MSDAORA to connect to DB These are all the problems/things I changed when we migrate our apps from SQLServer to Oracle! Hoping I covered all major things!