LOBs are subject to some restrictions that do not affect other scalar types because of their size.
Those restrictions are documented in the context of the relevant SQL syntax.
A scalar type contains an atomic value, whereas a nonscalar (sometimes called a "collection") contains a set of values.
A large object (LOB) is a special form of scalar datatype representing a large scalar value of binary or character data.
Let's see how it is used, to further understand what it is. Suppose you are a professional with your own business.