Flackback Query with Versioning

Question

Hi,
I am given 2 times. I need to know what has changed between the two times.
SELECT versions_startscn, versions_starttime,
       versions_endscn, versions_endtime,
       versions_xid, versions_operation,
       sec_id, ...,...,...,...,...
  FROM op_seremain_scd
  VERSIONS BETWEEN TIMESTAMP
      TO_TIMESTAMP('2010-06-10 12:00:00', 'YYYY-MM-DD HH24:MI:SS')
AND TO_TIMESTAMP('2010-06-14 11:00:00', 'YYYY-MM-DD HH24:MI:SS')I get the following:
1                                   00000060 Z
2                                   0000009CXT
3                                   00000647 Y
4                                   000312   X
5     8088277359248     11-JUN-10 03.31.52 PM               05000C004D580000     I     000SXW9IBT
6     8088277359248     11-JUN-10 03.31.52 PM               05000C004D580000     D     000SXW9IBTThe I means Inserted and D means Deleted. Simple enough. What if the row was updated? How does that get presented? Will I see what was changed or the record at that time?
I need to be able to show the record as is and what was changed. How can I accomplish that with the above example?
Possible?

Answer 1

Centinul wrote:
Have you setup a test case to find out?
SQL> DROP TABLE TEST;
Table dropped.
SQL>
SQL> COLUMN VERSIONS_OPERATION FORMAT A18
SQL> COLUMN VERSIONS_ENDTIME FORMAT A25
SQL> COLUMN VERSIONS_STARTTIME FORMAT A25
SQL> COLUMN COL1 FORMAT A4
SQL> COLUMN COL2 FORMAT A4
SQL> COLUMN PREV_COL1 FORMAT A9
SQL> COLUMN PREV_COL2 FORMAT A9
SQL> SELECT * FROM V$VERSION;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE     10.2.0.4.0     Production
TNS for 64-bit Windows: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
SQL> CREATE TABLE test
2  (
3          ID      NUMBER  PRIMARY KEY
4  ,       COL1    VARCHAR2(3)
5  ,       COL2    VARCHAR2(3)
6  );
Table created.
SQL> INSERT INTO test (id, col1, col2) VALUES (1,'ABC','DEF');
1 row created.
SQL> INSERT INTO test (id, col1, col2) VALUES (2,'GHI','JKL');
1 row created.
SQL> INSERT INTO test (id, col1, col2) VALUES (3,'MNO','PQR');
1 row created.
SQL> INSERT INTO test (id, col1, col2) VALUES (4,'STU','VWX');
1 row created.
SQL> COMMIT;
Commit complete.
SQL> exec DBMS_LOCK.SLEEP(10);
PL/SQL procedure successfully completed.
SQL> UPDATE  test
2  SET     col1 = 'ZZZ'
3  WHERE   id   = 3
4  ;
1 row updated.
SQL> COMMIT;
Commit complete.
SQL> SELECT  id
2  ,       col1
3  ,       prev_col1
4  ,       col2
5  ,       prev_col2
6  FROM
7  (
8          SELECT  id
9          ,       col1
10          ,       col2
11          ,       LAG(col1) OVER (PARTITION BY id ORDER BY VERSIONS_STARTTIME NULLS FIRST) AS prev_col1
12          ,       LAG(col2) OVER (PARTITION BY id ORDER BY VERSIONS_STARTTIME NULLS FIRST) AS prev_col2
13          ,       versions_operation                                                       AS vo
14          FROM    test
15          VERSIONS BETWEEN TIMESTAMP MINVALUE AND MAXVALUE
16  )
17  WHERE vo = 'U'
18  ;
ID COL1 PREV_COL1 COL2 PREV_COL2
3 ZZZ  MNO       PQR  PQR
SQL> spool off;With the Flashback Versions query you see each instance of the row. Therefore, you can use the LAG/LEAD analytical functions to collapse two row changes into a single row and look at the before and after image.
Hope this helps!Exactly! The example below has solved my issue and infact helped me solve another issue and combine it with this problem I had.
Thanks again.