Physical layer is required?
Hello
If we can create the star schema, appropriate joints and all that physical layer is made in the database itself. Can avoid us / is it possible to avoid the PHYSICAL LAYER in the repository. Is there a meaning to the physical layer?
In the layer MDB in a similar way also can avoid us this... because everything is done in the database itself.
Kind regards
Séverine.
Mandatory? Yes
But if everything is really done (once again: REALLY well done) in the DB when you import the objects from the database, you can also import the indexes and relationships and you end up with a physical layer to work without doing anything by hand. If it is perfect as it just slip & fall to MDB and there still no need to do any work by hand.
But be realistic: if I can imagine your physical layer from the DB itself because you have the correct definition of keys and links in the comic book, just keep in mind that if the layer MDB is called 'business' layer is because this isn't like the DB.
In the MDB, you are supposed to have commercial names, with spaces, lower case names. The logical keys aren't IDS used in the DB, etc.
Another detail: what about the dimensions, aggregations and hierarchies?
You can't them to DB, SUM, AVG, or any other rule of aggregation for your facts does not come from the DB. Hierarchies and levels of content related settings cannot be in the comic book.
If you guess, you have nothing to do in MDB, because it's done in the comic book you'll likely read again what is the MDB layer that is supposed to do.
Tags: Business Intelligence
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