Question: Which of the following is true concerning a global transaction?
Options
A : The required data are at one local site and the distributed DBMS routes requests as necessary.
B : The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.
C : The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.
D : The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS.
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A homogenous distributed database is which of the following?
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A semijoin is which of the following?
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