Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 10 Feb 2018 My Price 4.00

conceptual schemas

Exercise 1.4 Explain the difference between  external,  internal,  and  conceptual  schemas. How are these different schema layers related to the concepts of logical and physical data independence?

 

Exercise 1.5 What are the responsibilities of a DBA? If we assume that the DBA is never interested in running his or her own queries, does the DBA still need to understand query optimization?  Why?

 

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Maurice Tutor
(5)
Status NEW Posted 10 Feb 2018 11:02 PM My Price 4.00

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