I was looking for a query which picks data from a table having Blob column and update a table having LONG RAW column. It seems Oracle supports only up to 4000 characters. Is the
Despite the fact that you make a reversal (normaly you should move from LONG to LOB, LONG being obsolete)...
You must use dbms_lob package, and make some plsql:
Eventualy you can use read, getlength...
Doc you can find here Psoug.org or on Oracle doc