Re: Daily job to populate table in another database

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                                                                                     
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                    10/12/2002                                                                                     
                    20:28                                                                                          
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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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