Hi,
There are a few options available - other people have already suggested
replication, etc.
I think the decision depends slightly on data volume and personal
preference:
* Certainly I have been in situations where database links are used to both
pull and push data from one database to another.
* Another option is to use UTL_FILE to create a file (from within a
package) and the SQL*Load that file on the other end - using parallel
direct loads, etc I have seen high volumes of data moved using this
technique.
* A slight variation is to use SQL*Plus to spool a file, instead of
UTL_FILE. I have no figures or rules, but personal experience has shown
this to be faster than using UTL_FILE.
* If the table is large and partitioned then you might be able to perform
the above options on multiple partitions at the same time, or perhaps
introduce some logic so that only modified partitions are copied each
night.
* With regards to your manipulations, you may be able to perform them
whilst creating the file or you might need to use a temporary table to
first perform the manipulation and then dump this table to a file.
* Export / import is another option available - although I find it more
awkward to implement than the other options typically.
Having said all of that - if you're only dealing with a small volume of
data and performance is not absolutely critical than any option would be
fine, including a database link.
Regards,
Mark.
"CHAN Chor
Ling Catherine To: Multiple recipients of list ORACLE-L
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10/12/2002
20:28
Please respond
to ORACLE-L
Hi Gurus,
If you need to copy data (after some manipulations) from database A to
another table in database B, how do you achieve that ?
Our current practice is to use crontab (schedule daily job) and sqlplus
(procedure to copy the data over to another database via dblink).
Do you think it's more efficient to use DBMS_JOB ? Can DBMS_JOB call the
procedure at the same time daily ? Any sample? Please advise. Thanks.
Regds,
new bee
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