System Analysis and Design
Data Definition Language (DDL)

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

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System Analysis and Design
A menu-driven system

is required only for on-line systems
None of these
increases the operator's work
presents options and allows the user to make selections
can be used only by computer professionals

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