How to fetch table_names along with the result

Question

Hi all,
I want to find strucural differences between two kinds of tables .
One is original table and another one is archival table .
All archival table names will have different name from original tables.
Please tell me how to get table name in the below query..
((SELECT column_name, data_type, data_length, data_precision, nullable
    FROM user_tab_columns
   WHERE table_name LIKE '%X271%HIST'
         AND table_name <> 'X271_ELIG_RSPNS_TABLE')
MINUS
(SELECT column_name, data_type, data_length, data_precision, nullable
    FROM user_tab_columns
   WHERE table_name LIKE '%X271%'
     AND table_name NOT LIKE '%WS'
     AND table_name NOT LIKE '%_HIST'
     AND table_name <> 'X271_ELIG_RSPNS_TABLE')
UNION ALL
((SELECT column_name, data_type, data_length, data_precision, nullable
     FROM user_tab_columns
    WHERE table_name LIKE '%X271%'
      AND table_name NOT LIKE '%WS'
      AND table_name NOT LIKE '%_HIST'
      AND table_name <> 'X271_ELIG_RSPNS_TABLE')
  MINUS
  (SELECT column_name, data_type, data_length, data_precision, nullable
     FROM user_tab_columns
    WHERE table_name LIKE '%X271%HIST'
      AND table_name <> 'X271_ELIG_RSPNS_TABLE')));Thanks,
P Prakash
Edited by: prakash on Sep 5, 2011 5:49 AM

Answer 1

You'll have to JOIN instead of MINUS:
SELECT * FROM
  (SELECT table_name, column_name, data_type, data_length, data_precision, nullable WHERE table_name = 'orig') orig
  INNER JOIN
  (SELECT table_name, column_name, data_type, data_length, data_precision, nullable WHERE table_name != 'orig') other
  USING(table_name, column_name)
WHERE
  orig.data_type != other.data_type OR
  orig.data_length != other.data_length OR
...This doesnt show tables whose column names have changed, for that you'll have to use a full outer join:
SELECT * FROM
  (SELECT table_name, column_name WHERE table_name = 'orig') orig
  INNER JOIN
  (SELECT table_name, column_name WHERE table_name != 'orig') other
  ON(orig.table_name = other.table_name AND orig.column_name = other.column_name)
WHERE
  orig.column_name IS NULL or
  other.column_name IS NULLYou could maybe combine these.. i know my oracle 9.2 would fall over if I tried so i didnt :)