System Analysis and Design
Indexed-Sequential organization

has records placed randomly throughout the file
means storing records in contiguous blocks according to a key
stores records sequentially but uses an index to locate records
uses an index for each key type

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System Analysis and Design
Data Definition Language (DDL)

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

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System Analysis and Design
An open rectangle

defines a source or destination of system data
None of these
represents a process that transforms incoming data flow(s) into outgoing data flows
identifies data flow
is a data store-data at rest, or a temporary repository of data

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