Define slowly changing dimensions (SCD)?
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two sources S1,S2 containing measures M1,M2,M3, 4 dimensions D1,D2,D3,D4, 1 Fact F1 containing measures M1,M2,M3 and surrogate keys K1,K2,K3,K4 (a) write a sql statement to populate Fact table F1 (b) Design a mapping in Informatica for loading of fact table F1.
I have two tables in two different database, so to join these tables which transformation will be better joiner transformation or lookup transformation?
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how to join two tables without using joiner transformation .advantages of joiner over lookup and vice versa.
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