PL SQL Data Types Oracle PLSQL Tutorial

The LONG RAW datatype is just like RAW.
The maximum length of the LONG RAW datatype is 32760 bytes.
The Syntax for the LONG RAW Datatype

variable_name LONG RAW(size);
size is the size, in bytes, of the variable.
size must be a number between 1 and 32760.
Here are some examples:

a_picture LONG RAW(30000);
As with a RAW, no character set conversion is performed.
The database version of LONG RAW allows up to 2 gigabytes of data.