A Double-Byte Character Large OBject (DBCLOB) is a varying-length string of double-byte characters that can be up to 1 073 741 823 characters long. A DBCLOB is used to store large DBCS character based data such as documents written with a single character set (and, therefore has a DBCS CCSID associated with it). Note that a DBCLOB is considered to be a graphic string.