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zahidrahim_ocp
Partner - Creator
Partner - Creator

Incremental Load on View

Dear Experts,

I have a Oracle view which contains 4 to 5 tables to load data. Now initially All the data returned by the view has been loaded at the current date.

Now what is the best approach to add only new data i-e updates in previous data and inserts from current date onward.

Regards,

Zahid Rahim

5 Replies
shraddha_g
Partner - Master III
Partner - Master III

if you have stored data into qvd then you can get Max(Date) from that Qvd

MaxDate:

Load

Max(Date) as LastUpdatedDate

from......PreviouslyLoaded.qvd

(qvd);

Let vDate = date(peek('LastUpdatedDate'));

OracleNewData:

Sql Select *

From ..Source

Where DateField > Date($(vDate)) ;  // Here date format should match with the one with the Oracle date field

agigliotti
Partner - Champion
Partner - Champion

take a look at Incremental Load.docx

zahidrahim_ocp
Partner - Creator
Partner - Creator
Author

Thank you all for the responses but the problem is Last Update Date will be in 5 tables. How to manage 5 different last update dates.

shraddha_g
Partner - Master III
Partner - Master III

Can you share a script of oracle view for current date

zahidrahim_ocp
Partner - Creator
Partner - Creator
Author

Dear Shraddha,

Oracle View can be of below format:

SELECT t1.columns, t1.LAST_UPDATE_DATE

t2.columns, t2.LAST_UPDATE_DATE,

t3.columns, t3.LAST_UPDATE_DATE,

t4.columns, t4.LAST_UPDATE_DATE,

t5.columns, t5.LAST_UPDATE_DATE,

FROM t1,t2,t3,t4,t5

WHERE <All tables join>

Now with 5 different last_update_dates how can we effectively write incremental load script?

Regards,

Zahid Rahim