R/3 Delta changes in BW

Hello Everyone,
When we do an Init or Full data extraction from R/3 to BW for the first time for any extractor, the data gets loaded in BW. When we load delta changes from R/3 by doing a delta load into BW, how does BW know to extract only the changed R/3 records and not all records.
How are R/3 changes tracked in BW? where is the previous request information stored in BW?
Thanks in advance

Hi,
After initial full upload if there is any change in the records or any new records found then only the delta will work, if there is no new records then even u do the delta there is no updation..
One morething in RSA7 of detail view u will get the previous posted records and next delta records..the old records will me maintained untill the old request is successful and a new request was reached in r\3 from BW.
Regards-
Siddhu

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see these links
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A similar post
/message/1783778#1783778 [original link is broken]
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Hello Imthiaz,
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