Script: fk_columns.sql

-- -----------------------------------------------------------------------------------
       -- Author       : Pavan Yennampelli
    -- Description  : Displays information on all FKs for the specified schema and table.
    -- Requirements : Access to the V$ views.
    -- Call Syntax  : @fk_columns (schema-name or all) (table-name or all)
     -- -----------------------------------------------------------------------------------
    SET VERIFY OFF
    SET LINESIZE 1000
    COLUMN column_name FORMAT A30
    COLUMN r_column_name FORMAT A30

    SELECT c.constraint_name,
           cc.table_name,
           cc.column_name,
           rcc.table_name AS r_table_name,
           rcc.column_name AS r_column_name,
           cc.position
    FROM   dba_constraints c
           JOIN dba_cons_columns cc ON c.owner = cc.owner AND c.constraint_name = cc.constraint_name
           JOIN dba_cons_columns rcc ON c.owner = rcc.owner AND c.r_constraint_name = rcc.constraint_name AND cc.position = rcc.position
    WHERE  c.owner      = DECODE(UPPER('&1'), 'ALL', c.owner, UPPER('&1'))
    AND    c.table_name = DECODE(UPPER('&2'), 'ALL', c.table_name, UPPER('&2'))
    ORDER BY c.constraint_name, cc.table_name, cc.position;