INSERT then APPEND ONLY NEW DATA from TABLE_A into TABLE_B

2 questions:

?  why not put a trigger on table_A, to insert the inserted rows immediately into table_b?
?  if you don?t want to use a trigger, what is the "primary key" of the table A ?
 

I CANNOT USE A TRIGGER on the TABLE_A because the table is owned by SYS.  Actually, TABLE_A is DBA_AUDIT_TRAIL data dictionary view owned by SYS.  THERE IS NO PRIMARY KEY FOR DBA_AUDIT_TRAIL VIEW.

PLEASE SEND THE SQL STATMENTS AS EXAMPLES TO COMPLETE THIS HIGH PRIORITY TASK.

Thanks!!!

CONGRATULATIONS ON GETTING THE HIGHEST POINTS!!!

ok, if it's not a primary key, what is the combination of columns identifying if it's a new row, or if the row already exists?
do you know the MERGE statement?
www.psoug.org/reference/merge.html

TABLE_A has the TIMESTAMP column which helps to identify new records added to the table. TABLE_B also has a TIMESTAMP column.  The join on the two tables could be on the TIMESTAMP column.

I DID NOT WORK WITH MERGE STATEMENT.

I have run a shell script that will APPEND the new rows to TABLE_B through the cron every night.

Please send sample code/examples to append the new rows from TABLE_A  to TABLE_B.  

Thanks.

Are you going to manipulate the data in TABLE_B?
If not; why not use TABLE_A itslef for your application? Or a view on TABLE_A?

ok:

INSERT INTO TABLE_A(SELECT username, action, code
FROM TABLE_B
WHERE username NOT IN (SELECT * FROM X)
AND code NOT IN (SELECT * FROM Y))
AND timestampcol > ( select max(timestampcol) from TABLE_A)
ORDER BY 1, 2, 3;
 
COMMIT;

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I WILL NOT MANIPULATE the data in TABLE_B.

I need to use the MERGE statement for the following reasons:

1.  Everyday new records will be added to TABLE_A.

2.  Every night, the new records from TABLE_A must be appended to TABLE_B based on the
     TIMESTAMP column.  
    TIMESTAMP column is in both TABLE_A and TABLE_B.

3.  Every night, after the new records from TABLE_A must be appended to TABLE_B successfully,
     TABLE_A SHOULD BE TRUNCATED.

4.  I have to schedule two cron jobs run every night as follows

    1.  One cron job to append data to TABLE_B from TABLE_A.

    2.  The second cron job TRUNCATE TABLE_A after cron job one successfully completes.

I need an efficient solution for the above.  I think MERGE statement could be a good solution.  But I don't know the systax for the MERGE statement.

Please help with sample code/examples.

Thanks.

>> 3.  Every night, after the new records from TABLE_A must be appended to TABLE_B successfully,
     TABLE_A SHOULD BE TRUNCATED.

Doesnt it say that all the records in table A should be inserted into table B the next day, as you dont have any previous day's data in the table??
An insert into table B select * from table A should do.

I repeat the requirement.

Every night, after the new records from TABLE_A must be appended to TABLE_B successfully,
TABLE_A SHOULD BE TRUNCATED.

Your solution will not work.  

Every night through cron, the new records from TABLE_A must be appended successfully to TABLE_B.  This is the most important requirement.

Thanks.

"An insert into table B select * from table A should do." will not work for my requirement.

The requirement is NOT TO INSERT ALL RECORDS FORM TABLE_A INTO TABLE_B EVERY NIGHT.  This will make TABLE_B grow unnecessarily.

The requiremnt is to APPEND only new records from TABLE_A based on certain conditions into TABLE_B.

Thanks!

so, you want certain records to be copied from TableA to TableB (your initial insert), and then just truncate tableA....
so, where is the problem, then?

I created a new table TABLE_B. I have already done the initial insert into TABLE_B with records with certain conditions from TABLE_A.  

The requirement is to APPEND only new records from TABLE_A based on certain conditions into TABLE_B EVERY NIGHT THROUGH A CRON JOB.

The requirement is NOT TO INSERT ALL RECORDS FORM TABLE_A INTO TABLE_B EVERY NIGHT.  This will make TABLE_B grow unnecessarily.

Your solution is as follows:

angelIII:

INSERT INTO TABLE_A(SELECT username, action, code
FROM TABLE_B
WHERE username NOT IN (SELECT * FROM X)
AND code NOT IN (SELECT * FROM Y))
AND timestampcol > ( select max(timestampcol) from TABLE_A)
ORDER BY 1, 2, 3;
 
COMMIT;

Please clarify the following:

Will your solution given above (the INSERT statement), ONLY APPEND the new records based on the TIMESTAMP column along with other conditions from TABLE_A into TABLE_B EVERY NIGHT when the CRON JOB RUNS WITH YOUR INSERT STATEMENT?

If your INSERT statement solution ONLY APPENDS THE NEW RECORDS FROM TABLE_A TO TABLE_B EVERY NIGHT , THEN YOUR SOLUTION IS THE CORRECT SOLUTION.

I got another solution from sujith80 ("An insert into table B select * from table A should do." ).  At this point, I don't want to mix up the two solutions and get more confused.

I have 10-13-2008 deadline to meet.

Thanks!

during the day, will there we rows inserted into table_A with "old" timestamps?
no -> you don't need to worry at all, actually, about the timestamp, as you TRUNCATE/EMPTY table_A completely.

yes -> my INSERT was turned the wrong way round... I guess mislead by your text ...

INSERT INTO TABLE_B(SELECT username, action, code
FROM TABLE_A
WHERE username NOT IN (SELECT * FROM X)
AND code NOT IN (SELECT * FROM Y))
AND timestampcol > ( select max(timestampcol) from TABLE_B)
ORDER BY 1, 2, 3;
 
COMMIT;

Select allOpen in new window

At last, I could make my requirements clear to you.

"during the day, will there we rows inserted into table_A with "old" timestamps?  "

What do you mean by "old" timestamps?  

When you start the day, TABLE_A will be empty because it was TRUNCATED the previous night.

New records will be inserted into the EMPTY TABLE_A with the current date, that is, the SYSDATE when the day starts.

Please let me know if your final solution will APPEND new rows from TABLE_A to TABLE_B every night when the cron runs the INSERT statement.

Thanks!

>New records will be inserted into the EMPTY TABLE_A with the current date, that is, the SYSDATE when the day starts.

that answers my question with the "old timestamps": so you don't insert timestamp values of "older" dates. only the current day.


>Please let me know if your final solution will APPEND new rows from TABLE_A to TABLE_B every night when the cron runs the INSERT statement.
yes, it should.
in fact, as there are not "old" rows in Table_A due to the truncate, it cannot add "old" rows.

@as93is:
Logically; once you insert the data in table A to table B, and then clear table A;
the next day everything in table A are "new".

Just "SIMPLE" insert into table B select * from table A "WILL DO"!!!!

awking00
Yours is the correct solution.  I did some extensive testing of all the solutions provided for this question. Your solution got me the correct output.  If max(timestamp) is used then only one new record is retrieved instead 10 new records.
Thanks!

Glad to help.