What is the diff b/w logical query and physical query?

Thanks In advance

In OBIEE terms the logical query is how you query the BI Server, the Presentation services sends logical SQL to the BI Server, you can also write your own using JDBC , pull from BI Server using ODI etc.
The BI Server engine takes this logical query and writes (a number of) phyiscal querie(s) to satisfy the logical request, depeninding on how your BMM and Physical layer is setup. There are a number of rules the BI Server evaluates before deciding the most appropriate Physical query to generate, rules include Physical Joins, Aggregate tales / Hierarchy levels and so on.
Hope this helps,
Good luck with interview :-)
Alastair

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What is the diff b/w logical query and physical query?

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