The following sections describe SQL attribute functions.
An attribute function returns descriptive information about its operand. Except for the DEFAULT function, whose operand must be a column reference, the operand can be a general expression that is not evaluated mathematically.
When an attribute function is used in a request, the response returns one row for every data row that meets the search condition.
An attribute function may be an extension to ANSI SQL.
For a list of data type attributes, see Data Type Phrases.