Description of the illustration ceal_keep_usedcols_logical_layer.jpg

This diagram illustrates logical columns in an Accounts table before and after best practices have been applied. The list on the left shows all 11 logical columns (used and unused) in an Accounts table, with ambiguous names such as ACCNT_REGION, ACTIVE_FLG, ACCNT_HIN_NUM, and ROW_WID. The list on the right shows a clean list of logical columns, that is, only used columns appear in the list with more readable presentation names (Region, Active Flag, Account Name, Account Number).