System Analysis and Design
Sequential organization

None of these
has records placed randomly throughout the file
Stores records sequentially but uses an index to locate records
uses an index for each key type
means storing records in contiguous blocks according to a key.

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System Analysis and Design
Data Definition Language (DDL)

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

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