dba_log_groups

SELECT  log_group_name, owner, table_name,
DECODE(always, 'ALWAYS', 'Unconditional',
                NULL, 'Conditional') ALWAYS
FROM DBA_LOG_GROUPS
/

The contents of this view show the supplemental logging configured. This information helps to troubleshoot apply issues.

dba_log_group_columns

This view describes all columns in the database that are specified in log groups. For example, to query the columns in the group ALLINS1_LOG_GRP1, use the following SQL statement:

col OWNER for a8
col LOG_GROUP_NAME for a20
col TABLE_NAME for a20
col COLUMN_NAME for a12   

select * from dba_log_group_columns
SEE CODE DEPOT FOR FULL SCRIPT
/