## Column

All values in a column of a database table have the same data type. A value in a row of a column is the smallest data unit that can be selected from a table, to which functions can be applied, or that can be modified. Each column in a base table has a name that is unique within the table.

Column Types

Alphanumeric | Character string column All character strings in an alphanumeric column have the same length.
Numeric | Floating or fixed point column All numbers in a floating point column have the same coefficient length. All numbers in a fixed point column have the same format, that is, the same number of pre- and post-point decimal places.

See also:

SQL Reference Manual

Column Name

Defining columns with an SQL statement: column_definition