What is the Bfile used for?
BFILE is an Oracle proprietary data type that provides read-only access to data located outside the database tablespaces on tertiary storage devices, such as hard disks, network mounted files systems, CD-ROMs, PhotoCDs, and DVDs. BFILE data is not under transaction control and is not stored by database backups.
What is BLOB datatype in Oracle?
A BLOB (binary large object) is a varying-length binary string that can be up to 2,147,483,647 characters long. Like other binary types, BLOB strings are not associated with a code page. In addition, BLOB strings do not hold character data.
What is BLOB CLOB Nclob?
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.
What is raw data type in Oracle?
RAW. The RAW datatype is used for binary data or byte strings that are not to be interpreted by Oracle, for example, to store graphics character sequences. The maximum length of a RAW column is 2000 bytes.
What is Nclob datatype in Oracle?
NCLOB (National Character Large Object) is an Oracle data type that can hold up to 4 GB of character data. It’s similar to a CLOB, but characters are stored in a NLS or multibyte national character set.
When would you use a BLOB data type?
BLOB stands for Binary Large Objects and as its name suggests, it can be used for storing binary data while TEXT is used for storing large number of strings. BLOB can be used to store binary data that means we can store pictures, videos, sounds and programs also.
What is the maximum size of BLOB in Oracle?
|BLOB||Maximum size: (4 GB – 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB)|
|CHAR||Maximum size: 2000 bytes|
|CHAR VARYING||Maximum size: 4000 bytes|
|CLOB||Maximum size: (4 GB – 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB)|
What is difference between BLOB and Bfile?
Blobs are in the database and all of the features of the database are available. A bfile is a file in the OS, outside the database.
What is the difference between CLOB and Nclob?
The primary difference between these types is that the CLOB type uses 1 byte per character to store characters in the ASCII character set while the NCLOB type uses 2 or 3 bytes per character to store characters in the Unicode character set. The BLOB (Binary Large Object) type can store data in binary format.