System Analysis and Design
To reconstruct a system, which of the following key element(s) must be considered :

outputs and inputs
feedback and environment
control and processors.
all of the listed here

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System Analysis and Design
Data manipulation language (DML)

determine how data must be structured to produce the user's view
describes how data are structured in the data base
all of the listed here
specifies for the DBMS what is required; the techniques used to process data

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