BFILE
Maximum size: 4 GB
Maximum size of a file name: 255 characters
Maximum size of a directory name: 128 bytes
Maximum number of open BFILEs: see Comments
The maximum number of BFILEs is limited by the value of the SESSION_MAX_OPEN_FILES initialization parameter, which is itself limited by the maximum number of open files the operating system will allow.
BLOB
Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB)
The number of LOB columns per table is limited only by the maximum number of columns per table (that is, 1000Foot1).
CHAR
Maximum size: 2000 bytes
None
CLOB
Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB)
The number of LOB columns per table is limited only by the maximum number of columns per table (that is, 1000Foot1).
Literals (characters or numbers in SQL or PL/SQL)
Maximum size: 4000 characters
None
LONG
Maximum size: 2 GB - 1
Only one LONG column is allowed per table.
NCHAR
Maximum size: 2000 bytes
None
NCLOB
Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB)
The number of LOB columns per table is limited only by the maximum number of columns per table (that is, 1000Foot1).
NUMBER
999...(38 9's) x10125 maximum value
-999...(38 9's) x10125 minimum value
Can be represented to full 38-digit precision (the mantissa)
Can be represented to full 38-digit precision (the mantissa)
NVARCHAR2
Maximum size: 4000 bytes, or 32767 bytes if the MAX_STRING_SIZE initialization parameter is set to EXTENDED
See Also: "MAX_STRING_SIZE" initialization parameter for additional details
None
Precision
38 significant digits
None
RAW
Maximum size: 2000 bytes, or 32767 bytes if the MAX_STRING_SIZE initialization parameter is set to EXTENDED
See Also: "MAX_STRING_SIZE" initialization parameter for additional details
None
VARCHAR2
Maximum size: 4000 bytes, or 32767 bytes if the MAX_STRING_SIZE initialization parameter is set to EXTENDED
See Also: "MAX_STRING_SIZE" initialization parameter for additional details
None
