POSC Meta Model Specifications Version 2.3 Meta Data Relational Implementation

COLUMN_GROUP (COLUMN_GROUP)

(DDL)

A column_group defines a group of columns that together provide some logical meaning or a physical constraint. For example, if you have two columns that represent a quantity of length, one holding the numeric length value and the other holding the unit of measure that qualifies the numeric value, then these form a logical pair that is expressed with a column_group. Another example of column_group is to define those columns which are used in the construction of an index.

Table is related to: att_col_grp_map, column_group

Primary Key Constraint on: COLUMN_GROUP_S

© Copyright 1997-2001 POSC. All rights reserved.