Query below returns foreign keys defined in a database.

Query

SELECT  ChildDB || '.' || ChildTable as ForeignTable,
        '>-' as Rel,
        ParentDB || '.' || ParentTable as PrimaryTable,
        TRIM(TRAILING ','
                FROM XMLAGG(ChildKeyColumn)(varchar(1000)))
            AS ForeignColumns
FROM    DBC.All_RI_ChildrenV
WHERE   ChildDB NOT IN ('All', 'Crashdumps', 'DBC', 'dbcmngr', 
    'Default', 'External_AP', 'EXTUSER', 'LockLogShredder', 'PUBLIC',
    'Sys_Calendar', 'SysAdmin', 'SYSBAR', 'SYSJDBC', 'SYSLIB', 
    'SystemFe', 'SYSUDTLIB', 'SYSUIF', 'TD_SERVER_DB', 'TDStats',
    'TD_SYSGPL', 'TD_SYSXML', 'TDMaps', 'TDPUSER', 'TDQCD',
    'tdwm', 'SQLJ', 'TD_SYSFNLIB', 'SYSSPATIAL')
GROUP BY    ForeignTable,
            PrimaryTable
ORDER BY    ForeignTable,
            PrimaryTable;

Columns

• ForeignTable - foreign table database and name
• Rel - relationship symbol implicating direction
• PrimaryTable - primary (rerefenced) table database and name
• ForeignColumns - list of FK colum names, separated with ","

Rows

• One row represents one foreign key. If foreign key consists of multiple columns (composite key) it is still represented as one row.
• Scope of rows: all foregin keys in a database
• Ordered by foreign database name and table name

Sample results

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