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Informatica - What are surrogate keys usage in Oracle and Informatica?

asked marvit September 20, 2014 08:03 AM  

What are surrogate keys usage in Oracle and Informatica?


1 Answers

answered By vishnoiprem   0  
Surrogate key is a unique identification key, it is like an artificial or alternative key to production key, because the production key may be alphanumeric or composite key but the surrogate key is always single numeric key.

Assume the production key is an alphanumeric field if you create an index for this fields it will occupy more space, so it is not advisable to join/index, bz generally all the datawarehousing fact table are having historical data. These factable are linked with so many dimension table. if it's a numerical fields the performance is high
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