In ORACLE, the LOB type is specially used to store data of large objects, including large data such as large text, graphics/images, video clips, etc.
1.LOB type
ORACLE divides lobs into two types: internal lobs and external lobs
Internal lob includes three types: clob, blob and nclob, which are stored in the database and support transaction operations
External LOB has only one type of BFILE, the data of this type is stored in the operating system OS file, and does not support transaction operations.
CLOB/NCLOB is used to store large batches of character data, BLOB is used to store large batches of binary data, and BFILE stores pointers to OS files