Data migration from SQL Server to Oracle

Question

I am working on database migration project. Connecting to SQL Server using Oracle gateway. Image datatype in SQL Server is migrated to blob data in Oracle. But when I try to insert the data using insert command it gives an error.

SQL Server table:

create table xyz ([Image_Data] [image] NULL )

Oracle table:

create table xyz (Image_data BLOB null)

Insert command used:

insert into xyz
select * from xyz@sqldb;

Error message:

SQL Error: ORA-00997: illegal use of LONG datatype
00997. 00000 - "illegal use of LONG datatype"

Answer 1

ODBC is mapping SQL Server column to Oracle's LONG data type. It is not that easy to handle it.

The best way is to use DBMS_SQL package.

Here you can find useful notes:

http://ellebaek.wordpress.com/2010/12/06/converting-a-long-column-to-a-clob-on-the-fly/

Answer 2

We have successfully migrated the data with DTS Tool.