da-zero (8/20/2010)
Actually, to be precise, a dimension is not of SCD type 1,2,3 or hybrid, it's attributes are. A dimension can have a combination of different types of SCD. For example, the customer gender and name are SCD Type 1, but the address is type 2.
Actually, to be precise, SCD types refer to the chosen method to track changes therefore they are related to the object and not to the attributes.
A hybrid SCD type 6 is nothing but the single implementation of Types 1,2 and 3 (1+2+3=6) for a specific object a.k.a. table.
Hope this clarifies.
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Pablo (Paul) Berzukov
Author of Understanding Database Administration available at Amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.