SQL Loader - BLOB & LONG COLUMNS

Question

I have a table with 500 rows
200 out of these rows need to be exported from one database to another database.
These rows have long and blob columns with values. The long columns COULD contain all sorts of special characters.
How can this be achieved with SQL Loader? Is there any other tool that can be used to get this done?
Any help will be appreciated.

Answer 1

Hello,
What's your oracle version? As satish mentioned you can use datapump for load and unload. Here is an additional way of loading lob data
To load data upto 32k, you can use varchar2(32656) but its not a good idea to load clob in that manner because it's very inconsistent as length can vary resulting in string literal too long. So you have 2 choices now, first you have to use either procedure or anonymous block to load clob data
First Method -- I loaded alert.log successfully and you can imagine how big this file can be (5MB  (upto 4GB) in my test case)_
CREATE OR REPLACE DIRECTORY DIR AS '/myapth/logs';
DECLARE
   clob_data   CLOB;
   clob_file   BFILE;
BEGIN
   INSERT INTO t1clob
   VALUES (EMPTY_CLOB ())
   RETURNING clob_text INTO clob_data;
   clob_file   := BFILENAME ('DIR', 'wwalert_dss.log');
   DBMS_LOB.fileopen (clob_file);
   DBMS_LOB.loadfromfile (clob_data,
                          clob_file,
                          DBMS_LOB.getlength (clob_file)
   DBMS_LOB.fileclose (clob_file);
   COMMIT;
END;
Second Method: Use of Sqlldr_
LOAD DATA
INFILE alert.log "STR '|\n'"
REPLACE INTO  table t1clob
   clob_text char(30000000)
)Hope this helps.
Regards