Tech moves fast! Stay ahead of the curve with Techopedia!
Join nearly 200,000 subscribers who receive actionable tech insights from Techopedia.
A character large object (CLOB) is a large block of text stored in a database in some form of text encoding. Oracle and IBM DB2 database provide explicit support for CLOBs, though other databases can manipulate large amounts of text in some way. CLOBs can be very large, up to two gigabytes or larger.
A character large object, also known as a CLOB, is similar to a binary large object (BLOB) in that they are both large amounts of data. The key difference is that a CLOB is stored using a text encoding method such as ASCII or Unicode. CLOBs are supported in Oracle and IBM DB2, though some databases cannot use certain commands such as “LIKE” on CLOBs. Other databases support text, memo or long character fields. CLOBs can encompass long documents such as books. They can range up to two gigabytes in size or even more. Some databases store CLOBs by referencing out-of-table data.