Compare table data between two schemas?

Question

Hi,
I am looking for a script to compare the table data between the schemas (two different databases)? I know how to compare table by table but looking for a generic script where I can compare all the tables data from one schema to another schema?
Thanks a lot...

Answer 1

here the idea, adapt it with your needs :)
Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.7.0
Connected as SYS
SQL> create user user1 identified by user1;
User created
SQL> grant create  session to user1;
Grant succeeded
SQL> grant create table to user1;
Grant succeeded
SQL> alter user user1 quota 10m on DATA;
User altered
SQL> create user user2 identified by user2;
User created
SQL> alter user user2 quota 10m on DATA;
User altered
SQL> grant create table to user2;
Grant succeeded
SQL> grant create  session to user2;
Grant succeeded
SQL> create table user1.test(a Number) tablespace DATA;
Table created
SQL> create table user2.test(a Number) tablespace DATA;
Table created
SQL> insert into user1.test values (1);
1 row inserted
SQL> insert into user1.test values (2);
1 row inserted
SQL> commit;
Commit complete
SQL> insert into user2.test values (2);
1 row inserted
SQL> commit;
Commit complete
SQL> create table sys.logs(Diff number) tablespace data;
Table created
SQL> select * from sys.logs;
      DIFF
SQL>
CREATE OR REPLACE PROCEDURE TEST_MY_DIFF IS
  CURSOR CUR_ IS
    SELECT D.TABLE_NAME T_NAME FROM DBA_TABLES D WHERE D.OWNER = 'USER1';
  W_DIFF NUMBER;
  TYPE CV_TYP IS REF CURSOR;
  CV CV_TYP;
BEGIN
  EXECUTE IMMEDIATE 'TRUNCATE TABLE SYS.LOGS';
  FOR I IN CUR_ LOOP
    W_DIFF := 0;
    OPEN CV FOR 'select count(*)
from
( select * from USER1.' || I.T_NAME || '
minus
select * from USER2.' || I.T_NAME || ' )
union all
( select * from USER2.' || I.T_NAME || '
minus
select * from USER1.' || I.T_NAME || ')
    LOOP
      FETCH CV
        INTO W_DIFF;
      INSERT INTO SYS.LOGS VALUES (W_DIFF);
      COMMIT;
      EXIT WHEN CV%NOTFOUND;
    END LOOP;
  END LOOP;
EXCEPTION
  WHEN OTHERS THEN
    NULL;
END;
SQL> BEGIN
  2  test_my_diff;
  3  end;
  4  /
PL/SQL procedure successfully completed
SQL> select * from sys.logs;
      DIFF
         1
         1