If the BLOB type is to be used, you must create a user LOB RDAREA.
BLOB data is stored at an 8-kilobyte boundary, giving BINARY-type data better storage efficiency. However, if there is large object data, such that the 8-kilobyte boundary can be ignored, there is not much difference.
(2) Specification
Specify the BLOB type as the data type for the column when you use the CREATETABLE definition SQL statement.
(3) Notes
The BLOB type cannot be used with the following items: