Can you state any difference between the CLOB and NCLOB?
BLOB, CLOB, NCLOB and BFILE The built-in LOB data types BLOB, CLOB and NCLOB (stored internally), and BFILE (stored externally), can store large and unstructured data such as text, images and spatial data up to 4 gigabytes in size.
BLOB
The BLOB data type stores binary large objects. BLOB can store up to 4 gigabytes of binary data.
CLOB
The CBLOB data type stores character large objects. CLOB can store up to 4 gigabytes of character data.
NCLOB
The NCBLOB data type stores character large objects in multibyte national character set. NCLOB can store up to 4 gigabytes of character data.
BFILE
The BFILE data type enables access to binary file LOBs that are stored in file systems outside the Oracle database. A BFILE column stores a locator, which serves as a pointer to a binary file on the server's file system. The maximum file size supported is 4 gigabytes.