delete data from staging table as it loads to target table.here is the case we

delete data from staging table as it loads to target table.here is the case
we are getting data from 3 different server.a b and c.the data from server A loaded into staging table and we ran the task and data loaded to target table.now today data from server B and C also got loaded to the staging table.now what techniques and what transformations should be used to delete only the data which has been loaded only to the target.we need to delete only that data from staging which has been loaded into the target.looking for your responses

Question Posted / iumair85

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delete data from staging table as it loads to target table.here is the case we are getting data fro..

Answer / aparna

once the session loads the data to target ,truncate the staging table .So everytime we load is complete ,staging table will be empty .
In POST-SQL (Target ) : truncate the staging table .

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delete data from staging table as it loads to target table.here is the case we are getting data fro..

Answer / ram

Hi,

for identification add a port like source_id in the stage table.

create 3 session instances to load data from 3 sources.

write pre sql in each session instance to delete the
records from stage table.

delete from <stage_table>
where id in (select id from target table)
and source_id=<identifiaction_value>;

please let me know the if you have any questions.
bhupalreddy200@gmail.com

thanks
ram

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