How to copy LONG or LOB data from one table to another table?

[zxmgh]

Hi,

I try to copy LONG or LOB data from one table to another table, I use INSERT INTO...SELECT FROM, but it gives me error:

ORA-00997: illegal use of LONG datatype
ORA-22835: Buffer too small for CLOB to CHAR or BLOB to RAW conversion (actual: 15247, maximum: 4000)